1
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
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?
A
The packet will float in both water and liquid B.
B
The packet will sink in both water and liquid B.
C
The packet will sink in water but will float in liquid B.
D
The packet will float in water and sink in liquid B.
2
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
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
A
T
B
T / $\sqrt2$
C
2T
D
$\sqrt2$T
3
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
In which one of the following devices, the light energy is converted into the electrical energy?
A
Light-emitting diode 
B
Laser diode
C
Solar cell
D
Transistor
4
NDA General Ability 4 September 2022
MCQ (Single Correct Answer)
+4
-1.33
Change Language
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?
A
Infrasonic waves
B
Sound waves in audible range for human beings
C
Ultrasonic waves
D
All of the above
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