Physics · General Science · NDA
MCQ (Single Correct Answer)
1
Which one of the following statement is correct?
NDA 2015 Paper 2
2
Which one of the following statement is not correct?
NDA 2015 Paper 2
3
A brass ball is tied to a thin wire and swung, so as to move uniformly in a horizontal circle. Which of the following statement(s) in this regard is/are true?
1. The ball moves with constant velocity.
2. The ball moves with constant speed.
3. The ball moves with constant acceleration.
4. The magnitude of the acceleration of the ball is constant.
Select the correct answer using the codes given below.
1. The ball moves with constant velocity.
2. The ball moves with constant speed.
3. The ball moves with constant acceleration.
4. The magnitude of the acceleration of the ball is constant.
Select the correct answer using the codes given below.
NDA 2015 Paper 2
4
Two long wires each carrying a DC current in the same direction are placed close to each other.
Which one of the following statement is correct?
Which one of the following statement is correct?
NDA 2015 Paper 2
5
The absolute zero, i.e. temperature below which is not achievable, is about
NDA 2015 Paper 2
6
Lightning conductors are used to protect building from lightning strikes. Which of the following statement(s) is/are true about lightning conductors?
1. Lightning conductors create an electric field at its top, so that lightning strikes it preferentially.
2. Lightning conductors reduce the effect of the strike by uniformly distributing the charge (current) over the surface of the building.
3. Lightning conductors take all charges (current) to deep down in the earth.
4. Lightning conductors must be installed at a place taller than the building.
Select the correct answer using the codes given below
1. Lightning conductors create an electric field at its top, so that lightning strikes it preferentially.
2. Lightning conductors reduce the effect of the strike by uniformly distributing the charge (current) over the surface of the building.
3. Lightning conductors take all charges (current) to deep down in the earth.
4. Lightning conductors must be installed at a place taller than the building.
Select the correct answer using the codes given below
NDA 2015 Paper 2
7
The silvering in thermo flask is done to avoid heat transfer by
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8
Conservation of momentum in a collision between particles can be understood on the basis of
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9
Two forces, one of 3 N and another of 4 N are applied on a standard 1 kg body, placed on a horizontal and frictionless surface, simultaneously along the X-axis and the Y-axis, respectively, as shown below.
Image
The magnitude of the resultant acceleration is
Image
The magnitude of the resultant acceleration is
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10
Magnetic meridian is an imaginary
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11
In SI unit of force 'newton' (N) is given by (where, 'kg' stands for 'kilogram' 'm' stands for 'metre' and 's' stands for 'second')
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12
The acceleration due to gravity 'g' for objects on or near the surface of earth is related to the universal gravitational constant 'G' as ('M' is the mass of the earth and 'R' is its radius)
NDA 2015 Paper 2
13
The loudness of sound is related to
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14
X-rays are electromagnetic radiation whose wavelengths are of the order of
NDA 2015 Paper 2
15
In case of a compound microscope, which of the following statements is/are correct?
1. The focal length of the eyepiece is larger than the focal length of the objective.
2. The focal length of the eyepiece is smaller than the focal length of the objective.
3. The image produced in a normal optical microscope is real.
4. The image produced in a normal optical microscope is virtual.
Select the correct answer using the codes given below.
1. The focal length of the eyepiece is larger than the focal length of the objective.
2. The focal length of the eyepiece is smaller than the focal length of the objective.
3. The image produced in a normal optical microscope is real.
4. The image produced in a normal optical microscope is virtual.
Select the correct answer using the codes given below.
NDA 2015 Paper 2
16
Which one of the following statements is not correct?
NDA 2015 Paper 2
17
Which one of the following statements is not correct?
NDA 2015 Paper 2
18
Three equal resistances when combined in series are equivalent to 90$$\Omega$$. Their equivalent resistance when combined in parallel will be
NDA 2015 Paper 2
19
The following figure represents the velocity-time graph of a moving car on a road.
Image
Which segment of the graph represents the retardation?
Image
Which segment of the graph represents the retardation?
NDA 2015 Paper 2
20
Which one of the following statements is not correct?
NDA 2015 Paper 2
21
A man is sitting in a train which is moving with a velocity of 60 km/h. His speed with respect to the train is
NDA 2015 Paper 2
22
Which one of the following is the SI unit of the thermal conductivity of a material?
NDA 2015 Paper 2
23
Which one of the following statements is not correct?
NDA 2015 Paper 2
24
The resistance of a wire of length l and area of cross-section a is x $$\Omega$$. If the wire is stretched to double its length, then its resistance would become
NDA 2015 Paper 2
25
Which one of the following statements is not correct?
NDA 2016 Paper 2
26
If the image of an object formed by a concave mirror is virtual, erect and magnified, then the object is placed
NDA 2016 Paper 2
27
When three resistors, each having resistance r, are connected in parallel, their resultant resistance is x. If these three resistances are connected in series, then total resistance will be
NDA 2016 Paper 2
28
The property of electric current which is applicable in the fuse wire is
NDA 2016 Paper 2
29
Along a streamline flow of fluid,
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30
How is the kinetic energy of a moving object affected if the net work done on it is positive?
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31
A particle is executing simple harmonic motion. Which one of the following statements about the acceleration of the oscillating particle is true?
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32
Which one of the following four particles, whose displacement x and acceleration ax are related as follows, is executing simple harmonic motion?
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33
If we plot a graph between volume V and inverse of pressure p (i.e. $${1 \over p}$$) for an ideal gas at constant temperature T, the curve so obtained is
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34
Which one of the following statements is correct?
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35
Which one of the following statements is not correct?
NDA 2016 Paper 2
36
A particle executes linear simple harmonic motion with amplitude of 2 cm. When the particle is at 1 cm from the mean position, the magnitudes of the velocity and the acceleration are equal. Then, its time period is
NDA 2016 Paper 2
37
When a ray of light enters a glass slab, then
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38
A ball is thrown vertically upward from the ground with a speed of 25.2 m/s. The ball will reach the highest point of its journey in
NDA 2016 Paper 2
39
When sound waves are propagated through a medium, the physical quantity/quantities transmitted is/are
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40
Pressure is a scalar quantity because
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41
A person is unable to read a newspaper without his glasses. He is most probably suffering from
NDA 2016 Paper 2
42
The free fall acceleration g increases as one proceeds at sea level, from the equator towards either pole. The reason is
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43
Which one of the following statement is correct?
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44
Which one of the following is not a contact force?
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45
When a force of 1 N acts on a mass of 1 kg, which is able to move freely, the object moves in the direction of force with a/an
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46
Which one of the following statement is not correct?
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47
Two balls, A and B are thrown simultaneously, A vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8 m/s2 ?
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48
Which of the following item is used in the household wirings to prevent accidental fire in case of short circuit?
NDA 2016 Paper 2
49
Consider the following circuit
Image
The equivalent resistance of the circuit will be
Image
The equivalent resistance of the circuit will be
NDA 2016 Paper 1
50
A racing car accelerates on a straight line from rest to a speed of 50 m/s in 25 s. Assuming uniform acceleration of the throughout, the distance covered in this will be
NDA 2016 Paper 1
51
A man weighing 70 kg is coming down in lift. If the cable of the lift brakes sudden, the weight of the man would become
NDA 2016 Paper 1
52
A given conductor carrying a current of 1 ampere. It produces an amount of heat equal to 2000 J. If the current through the conductor is doubled, then the amount of heat produced will be
NDA 2016 Paper 1
53
A lady is standing in front of a plane mirror at a distance of 1 m from it. She walks 60 cm towards the mirror. The distance of her image now from herself (ignoring the thickness of the mirror) is
NDA 2016 Paper 1
54
The brightness of a star depends on its
NDA 2016 Paper 1
55
A glass vessel is filled with water up to the brim and a lid is fixed to it tightly. Then it is kept inside a freezer for hours. What is expected to happen?
NDA 2016 Paper 1
56
A simple circuit contains a 12 V battery and bulb having 24 $$\Omega$$ resistance. When turn on the switch, the ammeter connected to the circuit would read
NDA 2016 Paper 1
57
Three resistors with magnitudes 2, 4 and 8$$\Omega$$ are connected in parallel, then equivalent resistance of the system would be
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58
Two bodies A and B are moving with equal velocities. The mass of B is doubled that of A. In this context, which one of the following statement is correct?
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59
The SI unit of acceleration is
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60
An object is placed at the centre of curvature of a concave mirror of focal length 16 cm. If the object is shifted by 8 cm towards the focus, then the nature of the image would be
NDA 2016 Paper 1
61
A pencil is placed upright at a distance 10 cm from a convex lens of focal length 15 cm. The nature of the image of the pencil will be
NDA 2016 Paper 1
62
Which one of the following is a conventional energy source?
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63
A container is first filled with water and then the entire water is replaced by mercury. Mercury has a density of 13.6 $$\times$$ 103 kg/m3. If X is the weight of the water and Y is the weight of the mercury, then
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64
Density of water is
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65
Suppose the force of gravitation between two bodies of equal masses is F. If each mass is doubled keeping the distance of separation between them unchanged, then the force would become
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66
A body has a free fall from a height of 20 m. After falling through a distance of 5 m, then body would
NDA 2016 Paper 1
67
Mass of a particular amount of substance
1. is the amount of matter present in it
2. does not vary from place to place
3. changes with change in gravitational force
Select the correct answer using the codes given below.
1. is the amount of matter present in it
2. does not vary from place to place
3. changes with change in gravitational force
Select the correct answer using the codes given below.
NDA 2016 Paper 1
68
The impulse on a particle due to a force acting on it during a given time interval is equal to the change in its
NDA 2016 Paper 1
69
Which one of the following statement with regarding to expansion of materials due to heating is not correct?
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70
Which one of the following is not a form of stored energy?
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71
The motion of a car along a straight path is shown by the following figure
Image
The car starts from O and reaches A, B and C at different instants of time. During its motion from O to C and back to B, the distance covered and the magnitude of the displacement are respectively
Image
The car starts from O and reaches A, B and C at different instants of time. During its motion from O to C and back to B, the distance covered and the magnitude of the displacement are respectively
NDA 2016 Paper 1
72
Water boils at a lower temperature at high altitudes, because
NDA 2017 Paper 2
73
Concave mirror is used in headlights of vehicles, because it
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74
If some object is weighed when submerged in water, then what will happen to its weight compared to its weight in air?
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75
Which one of the following statements about a satellite orbiting around the earth is correct?
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76
Which one of the following statements about energy is correct?
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77
Step-up transformers are used for
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78
Which one among the following waves carries the maximum energy per photon?
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79
A rainbow is produced due to which one of the following phenomena?
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80
Bats detect obstacles in their path by receiving the reflected
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81
The statement that 'heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature', is known as
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82
Which one of the following wave does not belong to the category of the other three?
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83
Which one of the following statements is not correct?
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84
Which one of the following statements is not correct?
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85
An object moves in a circular path with a constant speed. Which one of the following statements is correct?
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86
The force acting on a particle of mass m moving along the X-axis is given by F(x) = Ax2 $$-$$ Bx. Which one of the following is the potential energy of the particle?
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87
The symbol of SI unit of inductance is H. It stands for
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88
In a vacuum, a five-rupee coin, a feather of sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t1, t2 and t3, respectively. In this situation, we will observe that
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89
Electron emission from a metallic surface by application of light is known as
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90
How long does light take to reach the earth from the sun?
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91
Radioactivity is measured by
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92
The mirrors used as rear-view mirrors in vehicles are
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93
Which one of the following waves is used for detecting forgery in currency notes?
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94
The majority charge carriers in a p-type semiconductors are
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95
The ionisation energy of hydrogen atom in the ground state is
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96
Which one of the following devices changes low voltage alternating current to high voltage alternating current and vice-versa?
NDA 2017 Paper 1
97
An optical illusion which occurs mainly in deserts during hot summer is based on the principle of
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98
At which place earth's magnetic field becomes horizontal?
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99
The speed of a car travelling on a straight road is listed below at successive intervals of 1 s.
Image
Which of the following is/are correct? The car travels
1. with a uniform acceleration of 2 m/s2.
2. 16 m in 4 s.
3. with an average speed of 4 m/s.
Image
Which of the following is/are correct? The car travels
1. with a uniform acceleration of 2 m/s2.
2. 16 m in 4 s.
3. with an average speed of 4 m/s.
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100
The speed of a body that has Mach number more than 1 is
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101
Rutherford's alpha-particle scattering experiment was responsible for the discovery of
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102
Which one of the following statements is not correct?
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103
The amount of heat required to change a liquid to gaseous state without any change in temperature is known as
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104
The following figure shows displacement versus time curve for a particle executing simple harmonic motion.
Image
Which one of the following statements is correct?
Image
Which one of the following statements is correct?
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105
Match List I with List II and select the correct answer using the codes given below the lists.
Image
Image
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106
A circular coil of single turn has a resistance of 20$$\Omega$$. Which one of the following is the correct value for the resistance between the ends of any diameter of the coil?
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107
In a solenoid, the current flowing through the wire is I and number of turns per unit length is n. This gives a magnetic field B inside the solenoid. If number of turns per unit length is increased to 2n, what will be the value of magnetic field in the solenoid?
NDA 2017 Paper 1
108
Which one of the following statements is correct about the magnification of an optical microscope?
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109
Colour vision in human eyes is the function of photoreceptor cells named
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110
The radii of curvature of the faces of a double convex lens are 10 cm and 20 cm. The refractive index of the glass is 1.5. What is the power of this lens?
NDA 2017 Paper 1
111
The time period of a simple pendulum made by using a thin copper wire of length L is T. Suppose the temperature of the room in which this simple pendulum is placed increases by 30$$^\circ$$C. What will be the effect on the time period of the pendulum?
NDA 2017 Paper 1
112
Which one of the following physical quantities has the same unit as that of pressure?
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113
Which one of the following statements is correct with regard to the material of electrical insulators?
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114
Which one of the following physical quantities does not affect the resistance of a cylindrical resistor?
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115
Which one of the following is the correct relation between frequency f and angular frequency $$\omega$$ ?
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116
A Kelvin thermometer and a Fahrenheit thermometer both give the same regarding for a certain sample. What would be the corresponding reading in a Celsius thermometer?
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117
If the potential difference applied to an X-ray tube is doubled while keeping the separation between the filament and the target as same, what will happen to the cut-off wavelength?
NDA 2017 Paper 1
118
Which one of the following statements is true for the relation, $$F = {{G{m_1}{m_2}} \over {{r^2}}}$$ ? (All symbols have their usual meanings.)
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119
Why is it difficult to measure the coefficient of expansion of a liquid than solid?
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120
If the absolute refractive indices of glass and water are $${3 \over 2}$$ and $${4 \over 3}$$ respectively, what will be the ratio of velocity of light in glass and water?
NDA 2017 Paper 1
121
A positive charge +q is placed at the centre of a hollow metallic sphere of inner radius a and outer radius b. The electric field at a distance r from the centre is denoted by E. In this regard, which one of the following statements is correct?
NDA 2017 Paper 1
122
Statement I The pitch of sound wave depends upon its frequency.
Statement II The loudness of the sound wave depends upon its amplitude.
Statement II The loudness of the sound wave depends upon its amplitude.
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123
Statement I Sound waves cannot propagate in vacuum.
Statement II Sound waves are elastic waves and require a medium to propagate.
Statement II Sound waves are elastic waves and require a medium to propagate.
NDA 2018 Paper 2
124
The frequency of ultrasonic waves is
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125
The magnetic field strength of a current carrying wire at a particular distance from the axis of the wire
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126
A stainless steel chamber contains Ar gas at a temperature T and pressure p. The total number of Ar atoms in the chamber is n. Now, Ar gas in the chamber is replaced by CO2 gas and the total number of CO2 molecules in the chamber is n/2 at the same temperature T. The pressure in the chamber now is p'. Which one of the following relation holds true? (Both the gases behave as an ideal gas)
NDA 2018 Paper 2
127
Which one of the following is the correct relation between $$\mathop A\limits^o $$ and nm?
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128
The full form of LED is
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129
If a free electron moves through a potential difference of 1 kV, then the energy gained by the electron is given by
NDA 2018 Paper 2
130
Consider the following circuit.
Image
Which one of the following is the value of the resistance between points A and B in the circuit given above ?
Image
Which one of the following is the value of the resistance between points A and B in the circuit given above ?
NDA 2018 Paper 2
131
The absolute zero temperature is 0$$^\circ$$K. In $$^\circ$$C unit, which one of the following is the absolute zero temperature ?
NDA 2018 Paper 2
132
Consider the following statements about visible light, UV light and X-ray.
1. The wavelength of visible light is more than that of X-ray.
2. The energy of X-ray photons is higher than that of UV light photons.
3. The energy of UV light photons is less than that of visible light photons.
Which of the statement(s) given above is/are correct?
1. The wavelength of visible light is more than that of X-ray.
2. The energy of X-ray photons is higher than that of UV light photons.
3. The energy of UV light photons is less than that of visible light photons.
Which of the statement(s) given above is/are correct?
NDA 2018 Paper 2
133
The time period of oscillation of a simple pendulum having length L and mass of the bob m is given as T. If the length of the pendulum is increased to 4L and the mass of the bob is increased to 2 m, then which one of the following is the new time period of oscillation?
NDA 2018 Paper 2
134
The connecting cable of electrical appliances like electric iron, water heater or room heater contains three insulated copper wires of three different colours - Red, Green and Black. Which one of the following is the correct code?
NDA 2018 Paper 2
135
The graph between current (I) and voltage (V) for three linear resistor 1, 2 and 3 is given below :
Image
If R1, R2 and R3 are the resistances of these resistors, then which one of the following is correct?
Image
If R1, R2 and R3 are the resistances of these resistors, then which one of the following is correct?
NDA 2018 Paper 2
136
Consider the following statements about a microscope and a telescope.
1. Both the eyepiece and the objective of a microscope are convex lenses.
2. The focal length of the objective of a telescope is larger than the focal length of its eyepiece.
3. The magnification of a telescope increases with the increase in focal length of its objective.
4. The magnification of a microscope increases with the increase in focal length of its objective.
Which of the statement(s) given above are correct?
1. Both the eyepiece and the objective of a microscope are convex lenses.
2. The focal length of the objective of a telescope is larger than the focal length of its eyepiece.
3. The magnification of a telescope increases with the increase in focal length of its objective.
4. The magnification of a microscope increases with the increase in focal length of its objective.
Which of the statement(s) given above are correct?
NDA 2018 Paper 2
137
A planet has a mass M1 and radius R1. The value of acceleration due to gravity on its surface is g1.
There is another planet 2, whose mass and radius both are two times that of the first planet. Which one of the following is acceleration due to gravity on the surface of planet 2 ?
There is another planet 2, whose mass and radius both are two times that of the first planet. Which one of the following is acceleration due to gravity on the surface of planet 2 ?
NDA 2018 Paper 2
138
The wavelength of X-rays is of the order of
NDA 2018 Paper 2
139
Consider the following velocity and time graph
Image
Which one of the following is the value of average acceleration from 8 s to 12 s ?
Image
Which one of the following is the value of average acceleration from 8 s to 12 s ?
NDA 2018 Paper 2
140
If the focal length of a convex lens is 50 cm, then which one of the following is its power?
NDA 2018 Paper 2
141
A ball is released from rest and rolls down an inclined plane as shown in the following figure, requiring 4 s to cover a distance of 100 cm along the plane
Image
Which one of the following is the correct value of angle $$\theta$$ that the plane makes with the horizontal ? (g = 1000 cm/s2)
Image
Which one of the following is the correct value of angle $$\theta$$ that the plane makes with the horizontal ? (g = 1000 cm/s2)
NDA 2018 Paper 2
142
The coefficient of areal expansion of a material is 1.6 $$\times$$ 10$$-$$5 K$$-$$1. Which one of the following gives the value of coefficient of volume expansion of this material?
NDA 2018 Paper 2
143
The refractive indices of two media and denoted by n1 and n2 and the velocities of light in these two media are respectively, v1 and v2. If n2/n1 is 1.5, then which one of the following statement is correct?
NDA 2018 Paper 2
144
Which one of the following statement is correct for a plane mirror?
NDA 2018 Paper 2
145
An object is placed in front of a convex mirror. Which one of the following statement is correct?
NDA 2018 Paper 2
146
A circular coil of radius R having N number of turns carries a steady current I. The magnetic induction at the centre of the coil is 0.1 T. If the number of turns is doubled and the radius is halved, then which one of the following will be the correct value for the magnetic induction at the centre of the coil?
NDA 2018 Paper 2
147
Which one of the following statement is correct?
NDA 2018 Paper 1
148
If T is the time period of an oscillating pendulum, then which one of the following statement is not correct?
NDA 2018 Paper 1
149
If an object moves with constant velocity, then which one of the following statement is not correct?
NDA 2018 Paper 1
150
An object is moving with uniform acceleration a. Its initial velocity is u and after time t, its velocity is v. The equation of its motion is v = u + at. The velocity (along Y - axis) - time (along X-axis) graph will be a straight line
NDA 2018 Paper 1
151
What is the net force experienced by a bar magnet placed in a uniform magnetic field?
NDA 2018 Paper 1
152
Which one of the following has maximum inertia?
NDA 2018 Paper 1
153
Which one of the following is the value of 1 kWh of energy converted into joules?
NDA 2018 Paper 1
154
Which one of the following statement about gravitational force is not correct?
NDA 2018 Paper 1
155
Whether an object will float or sink in a liquid, depends on
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156
Which one of the following device is non-ohmic?
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157
Which one of the following is the natural phenomenon based on a simple periscope works?
NDA 2018 Paper 1
158
Which one of the following frequency range is sensitive to human ears?
NDA 2018 Paper 1
159
Which of the following statement(s) about a fluid at rest in a cup is/are correct ?
1. Pressure is same at all the points in the fluid.
2. Pressure is exerted on the walls.
3. Pressure exists everywhere in the fluid.
1. Pressure is same at all the points in the fluid.
2. Pressure is exerted on the walls.
3. Pressure exists everywhere in the fluid.
NDA 2018 Paper 1
160
Which one of the following device is used to measure atmospheric pressure?
NDA 2018 Paper 1
161
Which of the following statement(s) about latent heat for a given substance is/are correct?
1. It is fixed at a given temperature.
2. It depends upon the temperature and volume.
3. It is independent of temperature and volume.
4. It depends on the temperature but independent of volume.
1. It is fixed at a given temperature.
2. It depends upon the temperature and volume.
3. It is independent of temperature and volume.
4. It depends on the temperature but independent of volume.
NDA 2018 Paper 1
162
Which one of the following statement about the mass of a body is correct?
NDA 2018 Paper 1
163
A ball balanced on a vertical rod is an example of
NDA 2018 Paper 1
164
Which of the following statement(s) about specific heat of a body is/are correct?
1. It depends upon mass and shape of the body.
2. It is independent of mass and shape of the body.
3. It depends only upon the temperature of the body.
1. It depends upon mass and shape of the body.
2. It is independent of mass and shape of the body.
3. It depends only upon the temperature of the body.
NDA 2018 Paper 1
165
Which one of the following is an example of the force of gravity of the earth acting on a vibrating pendulum bob?
NDA 2018 Paper 1
166
Which one of the following statement about the refractive index of a material medium with respect to air is correct?
NDA 2018 Paper 1
167
Which one of the following statement about magnetic field lines is not correct?
NDA 2018 Paper 1
168
Two convex lenses with power 2D are kept in contact with each other. The focal length of the combined lens system is
NDA 2018 Paper 1
169
Which of the following statement(s) about electromagnetic waves, sound waves and water waves is/are correct?
1. They exhibit reflection.
2. They carry energy.
3. They exert pressure.
4. They can travel in vacuum.
1. They exhibit reflection.
2. They carry energy.
3. They exert pressure.
4. They can travel in vacuum.
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170
Thermal capacity of a body depends on the
NDA 2018 Paper 1
171
Which one of the following metal is used in the filaments of photoelectric cells that converts light energy into electric energy?
NDA 2018 Paper 1
172
A thin disc and a thin ring, both have mass M and radius R. Both rotate about axes through their centre of mass and are perpendicular to their surfaces at the same angular velocity. Which one of the following statements is correct?
NDA 2019 Paper 2
173
In which of the following phenomena do heat waves travel along a straight line with the speed of light?
NDA 2019 Paper 2
174
Which one of the following statements regarding Ohm's law is not correct?
NDA 2019 Paper 2
175
When a ball bounces off the ground, which of the following changes suddenly?
(Assume no loss of energy to the floor)
(Assume no loss of energy to the floor)
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176
If an object moves at a non-zero constant acceleration for a certain interval of time, then the distance it covers in that time
NDA 2019 Paper 2
177
A solid disc and a solid sphere have the same mass and same radius. Which one has the higher moment of inertia about its centre of mass?
NDA 2019 Paper 2
178
Two substances of densities $$\rho$$1 and $$\rho$$2 are mixed in equal volume and their relative density is 4. When they are mixed in equal masses, relative density is 3. The values of $$\rho$$1 and $$\rho$$2 respectively, are
NDA 2019 Paper 2
179
A car starts from Bengaluru, goes 50 km in a straight line towards South, immediately turns around and returns to Bengaluru. The time taken for this round trip is 2h. The magnitude of the average velocity of the car for this round trip
NDA 2019 Paper 2
180
"The sum of emf's and potential differences around a closed loop equals zero" is a consequence of
NDA 2019 Paper 2
181
A student measures certain lengths using a meter scale having least count equal to 1 mm. Which one of the following measurement is more precise?
NDA 2019 Paper 2
182
If the work done on the system or by the system is zero, then which one of the following statement for a gas kept at a certain temperature is correct?
NDA 2019 Paper 2
183
Consider the following part of an electric circuit.
Image
The total electrical resistance in the given part of the electric circuit is
Image
The total electrical resistance in the given part of the electric circuit is
NDA 2019 Paper 2
184
Which one of the following statements regarding lenses is not correct?
NDA 2019 Paper 2
185
10 g of ice at $$-$$10$$^\circ$$ C is mixed with 10 g of water at 0$$^\circ$$ C. The amount of heat required to raise the temperature of mixture to 10$$^\circ$$ C is
NDA 2019 Paper 2
186
Soaps clean surfaces on the principle of based on
NDA 2019 Paper 2
187
Water is heated with a coil of resistance R connected to domestic supply. The rise of temperature of water will depend on
1. supply voltage
2. current passing through the coil
3. time for which voltage is supplied
Select the correct answer using the codes given below.
1. supply voltage
2. current passing through the coil
3. time for which voltage is supplied
Select the correct answer using the codes given below.
NDA 2019 Paper 2
188
A pendulum clock is lifted to a height where the gravitational acceleration has a certain value of g. Another pendulum clock of same length, but of double the mass of the bob is lifted to another height where the gravitational acceleration is $${g \over 2}$$. The time period of the second pendulum would be (in terms of period T of the first pendulum)
NDA 2019 Paper 2
189
The loudness of sound depends upon the
NDA 2019 Paper 2
190
Two bodies of mass M each are placed R distance apart. In another system, two bodies of mass 2M each are placed $${R \over 2}$$ distance apart. If F be the gravitational force between the bodies in the first system, then the gravitational force between the bodies in the second system will be
NDA 2019 Paper 2
191
Light rays move in straight lines. But through an optical fibre, they can move in any type of zig-zag path because
NDA 2019 Paper 2
192
Compared to audible sound waves, ultrasound waves have
NDA 2019 Paper 2
193
A rigid body of mass 2 kg is dropped from a stationary balloon kept at a height of 50 m from the ground. The speed of the body when it just touches the ground and the total energy when it is dropped from the balloon are respectively. (Take, acceleration due to gravity, g = 9.8 m/s2)
NDA 2019 Paper 2
194
The temperature of a place on one sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be
NDA 2019 Paper 2
195
Radiations coming from the sun are mostly in the form of
NDA 2019 Paper 2
196
Which of the following are the characteristics of electromagnetic waves ?
1. They are elastic waves.
2. They can also move in vacuum.
3. They have electric and magnetic components which are mutually perpendicular.
4. They move with a speed equal to 3 lakh meters per second.
Select the correct answer using the codes given below.
1. They are elastic waves.
2. They can also move in vacuum.
3. They have electric and magnetic components which are mutually perpendicular.
4. They move with a speed equal to 3 lakh meters per second.
Select the correct answer using the codes given below.
NDA 2019 Paper 2
197
The light energy escaping from the sun can be spread by
NDA 2019 Paper 1
198
The correct sequence of energy transfer that occurs when an apple falls to the ground is
NDA 2019 Paper 1
199
Which one of the following mineral is used as a fuel in nuclear power stations?
NDA 2019 Paper 1
200
Which one of the following can charge an insulator?
NDA 2019 Paper 1
201
At 20$$^\circ$$C, the speed of sound in water is approximately
NDA 2019 Paper 1
202
Let us consider a copper wire having radius r and length l. Let its resistance be R. If the radius of another copper wire is 2r and the length is l/2, then the resistance of this wire will be
NDA 2019 Paper 1
203
Basic scientific principle behind a nuclear reactor is
NDA 2019 Paper 1
204
Who among the following has explained the phenomenon of photoelectric effect?
NDA 2019 Paper 1
205
Two metallic wires A and B are made using copper. The radius of wire A is r while its length is l. A DC voltage V is applied across the wire A, causing power dissipation P. The radius of wire B is 2r and its length is 2l and the same DC voltage V is applied across it causing power dissipation P1. Which one of the following is the correct relationship between P and P1 ?
NDA 2019 Paper 1
206
Consider the following statements about a solenoid.
1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid.
2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid.
3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid.
Which of the statements given above are correct?
1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid.
2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid.
3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid.
Which of the statements given above are correct?
NDA 2019 Paper 1
207
Light year is a unit of measurement of
NDA 2019 Paper 1
208
The focal length of the objective lens of a telescope is 50 cm. If the magnification of the telescope is 25, then the focal length of the eyepiece is
NDA 2019 Paper 1
209
Which one of the following force is non-central and non-conservative?
NDA 2019 Paper 1
210
Consider the following statements relating to Richter scale.
1. It was devised in 1935 by Charles F. Richter.
2. It describes the quantity of energy released by a single earthquake.
3. Richter scale has no upper limit.
Which of the statement(s) given above is/are correct?
1. It was devised in 1935 by Charles F. Richter.
2. It describes the quantity of energy released by a single earthquake.
3. Richter scale has no upper limit.
Which of the statement(s) given above is/are correct?
NDA 2019 Paper 1
211
Suppose there are two planets, 1 and 2, having the same density, but their radii are R1 and R2 respectively, where R1 > R2. The accelerations due to gravity on the surface of these planets are related as
NDA 2019 Paper 1
212
The sun is seen little before it rises and for a short while after it sets. This is because of
NDA 2019 Paper 1
213
The figure shown below gives the time (t) versus position (x) graph of three objects A, B and C. Which one of the following is the correct relation between their speeds vA, vB and vC, respectively at any instant (t > 0) ?
Image
Image
NDA 2019 Paper 1
214
1 dyne (a unit of force in CGS system) equals to
NDA 2019 Paper 1
215
In the given velocity (v) versus time (t) graph, accelerated and decelerated motions are respectively represented by line segments
Image
Image
NDA 2019 Paper 1
216
Which one of the following statement regarding a thermo flask is not correct?
NDA 2019 Paper 1
217
Black hole is a
NDA 2019 Paper 1
218
The formula for conversion between Fahrenheit and Celsius is $$^\circ$$F = X + (1.8 $$\times$$ $$^\circ$$C).
NDA 2019 Paper 1
219
When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is
NDA 2019 Paper 1
220
LIGO stands for
NDA 2019 Paper 1
221
A fuse wire must be
NDA 2019 Paper 1
222
An infinite combination of resistors, each having resistance $R = 4 \Omega$, is given below. What is the net resistance between the points A and B? (Each resistance is of equal value, $R = 4 \Omega$)
NDA General Ability 21 April 2024
223
An electric circuit is given below. $V_1 = 1 V$ and Resistance $R = 1000 \Omega$.
The current through the resistance $R$ is very close to $1$ mA and the voltage across point A and B, $V_{AB} = 1 V$. Now the circuit is changed to :
where value of $V_2 = 5 V$. The internal resistances of both the batteries are $0.1 \Omega$. The current through the resistance $R$ is about :
NDA General Ability 21 April 2024
224
If the current through an electrical machine running on direct current is $15 A$ and the machine runs for $10$ minutes, the charge that passes through the machine during this time is:
NDA General Ability 21 April 2024
225
Which one of the following is the best shape of a solid metal rod to form the top end of a lightning conductor?
NDA General Ability 21 April 2024
226
Which of the following forces is/are fundamental in nature?
1. Gravitational force
2. Electromagnetic forces
3. Strong and weak nuclear forces
Select the correct answer using the code given below :
NDA General Ability 21 April 2024
227
A spherical shell of outer radius R and inner radius R/2 contains a solid sphere of radius R/2 (see figure). The density of the material of the solid sphere is ρ and that of the shell is ρ/2. What is the average mass density of the larger sphere thus formed?
NDA General Ability 21 April 2024
228
The human eye is like a camera that has a lens with :
NDA General Ability 21 April 2024
229
A uniform meter scale of mass 0.24 kg is made of steel. It is kept on two wedges, W₁ and W₂, in a horizontal position. W₁ is at a distance of 0.2 m from one of its ends, while W₂ is at a distance of 0.4 m from the other end. If the force on the scale is N₁ due to W₁ and N₂ due to W₂, then : (take g = 10.0 m s⁻²)
NDA General Ability 21 April 2024
230
Escape speed from the Earth is close to 11.2 km s⁻¹. On another planet whose radius is half of the Earth's radius and whose mass density is four times that of the Earth, the escape speed in km s⁻¹ will be close to :
NDA General Ability 21 April 2024
231
Which one of the following does not apply to sound waves in fluids?
NDA General Ability 21 April 2024
232
A ball of 0.1 kg mass is dropped on a hard floor from a height of 0.45 m and rises to a height of 0.2 m. If it was in touch with the floor for 0.1 s, the net force it applied on the floor while bouncing is : (take the gravitational acceleration g = 10 m s⁻²)
NDA General Ability 21 April 2024
233
Which one of the following statements regarding simple pendulum is correct?
Simple pendulum has a time period independent of amplitude:
NDA General Ability 21 April 2024
234
Which one of the following about different frictional forces is correct?
NDA General Ability 21 April 2024
235
A metallic bob X of mass m is released from position A. It collides elastically with another identical bob Y placed at rest at position B on a horizontal frictionless table. The angle AOB is 30°.
How high does the bob X rise immediately after the collision?
NDA General Ability 21 April 2024
236
Consider the two statements given below:
Statement-1 : Infrared waves are also called heat waves.
Statement-2 : Water molecules readily absorb infrared waves.
Select the correct answer using the code given below :
NDA General Ability 21 April 2024
237
If the block P as shown in the figure below were to be at rest, what should the magnitude of force F be?
NDA General Ability 21 April 2024
238
Of the following, which does not belong to a nuclear reactor?
NDA General Ability 21 April 2024
239
Consider the following electric circuit :
The current in the above electric circuit is :
NDA General Ability 21 April 2024
240
A microscope may be a combination of :
NDA General Ability 21 April 2024
241
For a human eye, where u is the distance of an object from the eye, f is the focal length of the lens and v is the distance of image from the eye, which is the correct schematic graph?
NDA General Ability 21 April 2024
242
Which of the following statements with regard to the phenomenon of the primary rainbow formation by water droplets is/are correct?
1. It involves refraction and one internal reflection of sunlight.
2. It involves refraction of sunlight only.
3. It is formed as the inner bow.
4. It may involve more than one internal reflection as well as refraction of sunlight.
Select the answer using the code given below :
NDA General Ability 21 April 2024
243
Which one of the following scientists mentioned that an electron in an atom could revolve in certain stable orbits without the emission of radiant energy?
NDA General Ability 21 April 2024
244
LIGO experiment confirmed one of the predictions of :
NDA General Ability 21 April 2024
245
A block of mass 2 kg, moving with the initial speed of 3 m/s comes to rest on a rough horizontal surface after travelling a distance of 3 m. The magnitude of the frictional force is :
NDA General Ability 21 April 2024
246
Which one of the following is primarily responsible for conduction of current in a metal?
NDA General Ability 21 April 2024
247
The streaming of light beams coming from the Sun through trees is said to have suggested that light travels in straight line. The particles on the path of light beams are visible to us because
NDA General Ability 3 September 2023
248
The flash of lightning is seen before the thunderstorm is heard. It verifies that
NDA General Ability 3 September 2023
249
The potential difference between the two end terminals of an electric heater is 220 V and the current through it is 0.5 A. What would be the current through the heater if the potential difference across the terminals of the heater is reduced to 120 V?
NDA General Ability 3 September 2023
250
The heating element in an electric iron is usually made of
NDA General Ability 3 September 2023
251
Sita, 1.5 m high, stands before a plane mirror fixed on a wall to view her full image. What should be the minimum height of the plane mirror so that Sita can view her image fully?
NDA General Ability 3 September 2023
252
Which one of the following graphs correctly represents the current (I) - voltage (V) variation for a rectangular piece of a semiconductor wafer?
NDA General Ability 3 September 2023
253
Which one of the following is the usual unit of measurement for Air Pressure used in India?
NDA General Ability 3 September 2023
254
Ram records the odometer readings of his car for the distance covered from 2000 km at the start of his journey and 2400 km at the end of the journey after 8 hours. What is the average speed of the car?
NDA General Ability 3 September 2023
255
Ms. Rani decides to convert her AC generator into a DC generator. Which one of the following she would need to use?
NDA General Ability 3 September 2023
256
Ramesh cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
NDA General Ability 3 September 2023
257
Which of the following statements are correct about the electrical resistance and resistivity of a wire?
1. Both quantities depend on the area of cross-section of the wire
2. Both depend on the temperature
3. Resistance of the wire is directly proportional to the resistivity of the wire
4. Resistivity of the wire is directly proportional to the length of the
wire
Select the correct answer using the code given below:
NDA General Ability 3 September 2023
258
An iron nail sinks in water whereas an iron ship floats. Which of the following statements is correct in this regard?
1. Average density of ship is greater than that of the water
2. Average density of iron nail is greater than that of the water
3. Average density of the ship is less than that of the water
4. Average density of the ship is equal to that of the water
Select the correct answer using the code given below:
NDA General Ability 3 September 2023
259
Which of the following arrangement of resistors offers minimum effective resistance between points X and Y?
NDA General Ability 3 September 2023
260
What will happen if a collection of positive and negative charges are passed at a high speed through a magnetic field which is perpendicular to the direction of motion of the charges? (Assume that both kind of charges are NOT going to recombine)
NDA General Ability 3 September 2023
261
The motion of a particle of mass m is described by the relation, y = ut - 1⁄2 gt2, where u is the initial velocity of the particle. The force acting on the particle is
NDA General Ability 3 September 2023
262
A block of wood 40 cm × 20 cm × 10 cm) is kept on a tabletop in three different positions: (a) with its side of dimensions 20 cm × 10 cm; (b) with its side of dimensions 10 cm × 40 cm; and (c) with its side of dimensions 40 cm × 20 cm. The pressure exerted by the wooden block on the tabletop in these positions is represented by PA, PB and Pc, respectively. The pressure follows the trend
NDA General Ability 3 September 2023
263
Which one of the following graphs represents the equation of motion v = u + at; where all quantities are non-zero and symbols carry their usual meanings?
NDA General Ability 3 September 2023
264
Which one of the following statements is true for sound waves propa- gating in air?
NDA General Ability 3 September 2023
265
A 100 g sphere is moving at a speed of 20 m/s and collides with another. sphere of mass 50 g. If the second sphere was at rest prior to the collision and the first sphere comes at rest immediately after the collision, considering the collision to be elastic, the speed of the second sphere would be
NDA General Ability 3 September 2023
266
Which one of the following optical phenomena supports that the light is a transverse wave?
NDA General Ability 3 September 2023
267
How many of the following materials can be attracted by a magnet?
1. Plastic
2. Carbon
3. Aluminium
4. Stainless Steel
Select the correct answer using the code given below:
NDA General Ability 3 September 2023
268
Two identical spring balances S1 and S2 are connected one after the other and are held vertically as shown in the figure. A mass of 10 kg is hanging from S2. If the readings on S1 and S2 are W1 and W2 respectively, then :
NDA General Ability 16 April 2023
269
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
NDA General Ability 16 April 2023
270
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
NDA General Ability 16 April 2023
271
Two identical containers X and Y are connected at the bottom by a thin tube of negligible volume. The tube has a valve in it, as shown in the figure. Initially container X has a liquid filled up to height h in it and container Y is empty. When the valve is opened, both containers have equal amount of liquid in equilibrium. If the initial (before the valve is opened) potential energy of the liquid is P1 and the final potential energy is P2 then :
NDA General Ability 16 April 2023
272
A particle is moving in a circle of radius R with a constant speed v. Its average acceleration over the time when it moves over half the circle is :
NDA General Ability 16 April 2023
273
Two forces of 5⋅0 N each are acting on a point mass. If the angle between the forces is 60°, then the net force acting on the point mass has magnitude close to :
NDA General Ability 16 April 2023
274
A rectangle ABCD is kept in front of a concave mirror of focal length f with its corners A and B being, respectively, at distances 2f and 3f from the mirror with AB along the principal axis as shown in the figure. It forms an image A'B'C'D' in front of the mirror. What is the ratio of B'C' to A'D'?
NDA General Ability 16 April 2023
275
Shown in the figure are two plane mirrors XY and YZ (XY ⊥ YZ) joined at their edge. Also shown is a light ray falling on one of the mirrors and reflected back parallel to its original path as a result of this arrangement. The two mirrors are now rotated by an angle θ to their new position X'YZ', as shown. As a result the new reflected ray is at an angle α from the original reflected ray. Then :
NDA General Ability 16 April 2023
276
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
NDA General Ability 16 April 2023
277
Which one of the following statements is not true for a flute, a musical instrument?
NDA General Ability 16 April 2023
278
A positive charge is moving towards south in a space where magnetic field is pointing in the north direction. The moving charge will experience :
NDA General Ability 16 April 2023
279
Which one of the following astronomers proved that the Earth and other planets revolve around the Sun?
NDA General Ability 16 April 2023
280
Sand falls vertically on a conveyor belt at a work rate of 0⋅1 kg/s. In order to keep the belt moving at a uniform speed of 2 m/s, the force required to be applied on the belt is :
NDA General Ability 16 April 2023
281
The power required to lift a mass of 8⋅0 kg up a vertical distance of 4 m in 2 s is (taking acceleration due to gravity as 10 m/s2):
NDA General Ability 16 April 2023
282
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
NDA General Ability 16 April 2023
283
A mass is attached to a spring that hangs vertically. The extension produced in the spring is 6 cm on Earth. The acceleration due to gravity on the surface of the Moon is one-sixth of its value on the surface of the Earth. The extension of the spring on the Moon would be:
NDA General Ability 16 April 2023
284
Which one of the following is an example of Second Class Lever?
NDA General Ability 16 April 2023
285
In an electric circuit, a wire of resistance 10 Ω is used. If this wire is stretched to a length double of its original value, the current in the circuit would become :
NDA General Ability 16 April 2023
286
What is the total resistance in the following circuit element?
NDA General Ability 16 April 2023
287
Which one of the following statements is true?
NDA General Ability 16 April 2023
288
An electric bulb is rated as 220 V and 80 W. When it is operated on 110 V, the power rating would be:
NDA General Ability 16 April 2023
289
In the dispersion of white light by a common glass prism, which one among the following is correct?
NDA General Ability 16 April 2023
290
Which one among the following is true for the speed of sound in a given medium?
NDA General Ability 16 April 2023
291
Which one of the following telescopes contains only mirrors?
NDA General Ability 16 April 2023
292
Which one of the following statements about earthquake waves is not correct?
NDA General Ability 4 September 2022
293
The commercial unit of electrical energy is kilowatt-hour (kWh), which is equal to
NDA General Ability 4 September 2022
294
Which one of the following statements regarding a current-carrying solenoid is not correct?
NDA General Ability 4 September 2022
295
An object is made of two equal parts by volume; one part has density ρ0, and the other part has density 2ρ0. What is the average density of the object?
NDA General Ability 4 September 2022
296
A pressure cooker cooks food faster by
NDA General Ability 4 September 2022
297
Which one of the following wavelengths corresponds to the wavelength of X-rays?
NDA General Ability 4 September 2022
298
An electric bulb is connected to 220 V generator. The current drawn is 600 mA. What is the power of the bulb?
NDA General Ability 4 September 2022
299
When the pitch of sound increases, which one of the following increases?
NDA General Ability 4 September 2022
300
To help deep-sea divers breathe, they carry cylinders of oxygen mixed with
NDA General Ability 4 September 2022
301
Human eye can see objects at different distances with contrasting illuminations. This is due to
NDA General Ability 4 September 2022
302
What is the nature of velocity-time graph for a car moving with uniform acceleration?
NDA General Ability 4 September 2022
303
The amplitude of sound waves is measured in the units of
NDA General Ability 4 September 2022
304
A current of 0.6 A is drawn by an electric bulb for 10 minutes. Which one of the following is the amount of electric charge that flows through the circuit?
NDA General Ability 4 September 2022
305
A DC generator works on the principle of
NDA General Ability 4 September 2022
306
The presence of magnetic field can be determined using which one of the following instruments?
NDA General Ability 4 September 2022
307
Which one of the following statements about speed and velocity is correct?
NDA General Ability 4 September 2022
308
Two convex lenses have focal lengths of 50 cm and 25 cm, respectively. If these two lenses are placed in contact, then the net power of this combination will be equal to
NDA General Ability 4 September 2022
309
Which one of the following terms cannot represent electrical power in a circuit?
NDA General Ability 4 September 2022
310
The refractive index of crown glass is close to 3/2. If the speed of light in air is c, then the speed of light in the crown glass will be close to
NDA General Ability 4 September 2022
311
The volume of a sealed packet is 1 liter and its mass is 800 g. The packet is first put inside the water with a density of 1 g cm-3 and then in another liquid B with a density of 1.5 g cm-3. Then which one of the following statements holds true?
NDA General Ability 4 September 2022
312
A simple pendulum having bob of mass m and length of string l has time period of T. If the mass of the bob is doubled and the length of the string is halved, then the time period of this pendulum will be
NDA General Ability 4 September 2022
313
In which one of the following devices, the light energy is converted into the electrical energy?
NDA General Ability 4 September 2022
314
SONAR is a device that is used to measure the distance of underwater objects by a ship. Which of the following types of waves does it use for this purpose?
NDA General Ability 4 September 2022
315
Which one of the following statements about the speed of sound waves is not correct?
NDA General Ability 4 September 2022
316
Which one of the following metals is most commonly used for making filament of incandescent electric bulbs?
NDA General Ability 4 September 2022
317
A bullet of mass 10 g is horizontally fired with velocity 300 m s-1 from a pistol of mass 1 kg. What is the recoil velocity of the pistol?
NDA General Ability 4 September 2022
318
A microphone converts
NDA General Ability 4 September 2022
319
Inhabitants are unaware of the speed of rotation of the planet Earth because
1. the angular velocity is constant for each place on the Earth's surface
2. the atmosphere rotates with the Earth
3. there are no nearby objects, either stationary or moving at a rate different from that of the Earth
Which of the above is/are the correct explanation(s)?
NDA General Ability 10 April 2022
320
The twinkling of a star is due to the atmospheric
NDA General Ability 10 April 2022
321
A mass M is dragged by a pulley on a horizontal plane by a force anti-parallel to its displacement. The work done in pulling the mass M is
NDA General Ability 10 April 2022
322
A 5 N force is defined when a mass of 10 kg is accelerated with
NDA General Ability 10 April 2022
323
A boy of mass 52 kg jumps with a horizontal velocity of 2 m/s onto a stationary cart of mass 3 kg. The cart is fixed with frictionless wheels. Which one of the following would be the speed of the cart?
NDA General Ability 10 April 2022
324
The energy possessed by a body due to its change in position or shape is called
NDA General Ability 10 April 2022
325
A sound wave has a frequency of 1 kHz and wavelength 50 cm. How long will it take to travel 1 km?
NDA General Ability 10 April 2022
326
What is the mass of a material, whose specific heat capacity is 400 J/(kg °C) for a rise in temperature from 15°C to 25°C, when heat received is 20 kJ ?
NDA General Ability 10 April 2022
327
The specific latent heat of vaporization of a substance is the quantity of heat needed to change unit mass from
NDA General Ability 10 April 2022
328
Evaporation from the surface of a given liquid takes place more rapidly when
NDA General Ability 10 April 2022
329
Which of the following statements correctly explains/explain the existence of a positive force between two electric charges?
1. Both the charges are positive.
2. Both the charges are negative.
3. Both the charges are oppositely charged.
Select the correct answer using the code given below.
NDA General Ability 10 April 2022
330
An electric wire of resistance 50 ohm is cut into five equal wires. These wires are then connected in parallel. What is the equivalent resistance of this combination?
NDA General Ability 10 April 2022
331
The electric field lines from an isolated positively charged conducting sphere are
NDA General Ability 10 April 2022
332
The frequency of an alternating current is 3 Hz. It implies that
NDA General Ability 10 April 2022
333
Which one of the following correctly represents the SI unit of resistivity?
NDA General Ability 10 April 2022
334
What is the current required to light a 60 W incandescent bulb in a domestic supply of 240 V ?
NDA General Ability 10 April 2022
335
The magnetic field produced by a current-carrying straight wire at a point outside the wire depends
NDA General Ability 10 April 2022
336
What is the dimension of gravitational constant?
NDA General Ability 10 April 2022
337
A ball is thrown vertically upward with a speed of 40 m/s. The time taken by the ball to reach the maximum height would be approximately
NDA General Ability 10 April 2022
338
The time period of a 1 m long pendulum approximates to
NDA General Ability 10 April 2022
339
All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is
NDA General Ability 10 April 2022
340
According to Fleming's right-hand rule, if the forefinger indicates the direction of the magnetic field and the thumb shows the direction of motion of the conductor, then the stretched middle finger will predict the direction of
NDA General Ability 10 April 2022
341
Two resistors R1 and R2 arranged in parallel combination in an electrical closed circuit are made of the same material and of the same thickness. If the length of R2 is twice the length of R1, then the total resistance R satisfies
NDA General Ability 10 April 2022
342
What is the magnification produced by a concave lens of focal length 10 cm, when an image is formed at a distance of 5 cm from the lens?
NDA General Ability 10 April 2022
343
A wooden box of mass 2 kg and dimensions (30 cm × 15 cm × 10 cm) is placed on a table with sides 30 cm and 10 cm touching the tabletop. Which one of the following is the approximate pressure exerted on the table?
NDA General Ability 10 April 2022
344
Why are the tyres of aircrafts made of conducting rubber?
1. So that the charge accumulated on the aircraft in flight, by rubbing the air, can easily be transferred to ground on landing.
2. So that the charge accumulated due to the operation of various electronic equipments in the aircraft in flight can easily be transferred to ground on landing.
Select the correct answer using the code given below.
NDA General Ability 10 April 2022
345
Which one of the following statements with respect to Global Positioning System (GPS) is not correct?
NDA General Ability 10 April 2022
346
The electrostatic potential doesn't depend on which of the following
(1) It depends on the charge
(2) It depends on the endpoints of the path through work done
(3) It depends on the path taken for the work done
(4) It depends on the amount of work done
NDA General Ability 18 April 2021
347
Mirage is an illustration of
NDA General Ability 18 April 2021
348
Consider the following statements about Light year:
1. Light year is a unit for measurement of very large distances.
2. Light year is a unit for measurement of very large time intervals.
3. Light year is a unit for measurement of intensity of light.
Which of the statements given above is/are correct?
NDA General Ability 18 April 2021
349
Which one of the following regarding density of water at atmospheric pressure is correct?
NDA General Ability 18 April 2021
350
Which of the following pairs of physical phenomenon and the discover is/are correctly matched?
| 1. James Chadwick | Photoelectric |
| 2. Albert Einstein | Neutron |
| 3. Marie Curie | Radium |
NDA General Ability 18 April 2021
351
The statement "friction force is a contact force while magnetic force is a non-contact force" is
NDA General Ability 18 April 2021
352
The composition of gases in exosphere is
NDA General Ability 18 April 2021
353
Which one of the following is the lowest possible temperature?
NDA General Ability 18 April 2021
354
Numerically two thermometers, one in Fahrenheit scale and another in Celsius scale shall read same at
NDA General Ability 18 April 2021
355
The image we see in plane mirror is
NDA General Ability 18 April 2021
356
Point of Origin of Earthquake Wave is known as
NDA General Ability 18 April 2021
357
Which one of the following conclusions could not be derived from Rutherford's α-particle scattering experiment?
NDA General Ability 18 April 2021
358
Twinkling of stars is due to
NDA General Ability 18 April 2021
359
Which one of the following cannot be the unit of frequency of a sound wave?
NDA General Ability 18 April 2021
360
'Beats' is a phenomenon that occurs when frequencies of two harmonic waves are
NDA General Ability 18 April 2021
361
Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of the following properties is the same for the incident wave and the refracted wave?
NDA General Ability 18 April 2021
362
Which one of the following statements is true for a simple harmonic oscillator?
NDA General Ability 18 April 2021
363
Which one of the following colours may be obtained by combining green and red colours?
NDA General Ability 18 April 2021
364
Which of the following are the primary colours of light?
NDA General Ability 18 April 2021
365
According to the New Cartesian Sign Convention, which one of the following is correct is respect of the formula $\dfrac{1}{f} = \dfrac{1}{v}+ \dfrac{1}{u}$, where symbols have their usual meanings?
NDA General Ability 18 April 2021
366
Which one of the following statements is not correct for light rays?
NDA General Ability 18 April 2021
367
A glass prism splits white light into different colours. This phenomenon is called dispersion of light by prism. Which one of the following statements is correct?
NDA General Ability 18 April 2021
368
A current of 1.0 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is
NDA General Ability 18 April 2021
369
Which one of the following formulas does not represent electrical power?
NDA General Ability 18 April 2021
370
The sound created in a big hall persists because of the repeated reflections. The phenomenon is called
NDA General Ability 18 April 2021
371
When light scattered by a molecule and the frequency of the scattered light is changed, this phenomenon is called
NDA General Ability 18 April 2021