Electrostatics · Physics · AP EAPCET

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MCQ (Single Correct Answer)

1
A particle of mass 0.5 g and charge $10 \mu \mathrm{C}$ is subjected to a uniform electric field of $8 \mathrm{NC}^{-1}$. If the particle is initially at rest, the velocity of the particle after a time of 5 s is
AP EAPCET 2024 - 23th May Morning Shift
2
125 identical charged small spheres coalesce to form a big charged sphere. If the electric potential on each small sphere is 60 mV , then the electric potential on the bigger sphere formed is
AP EAPCET 2024 - 23th May Morning Shift
3
Two particles of charges 4 nC and $Q$ are kept in air with a separation of 10 cm between them. If the electrostatic potential energy of the system is $1.8 \mu \mathrm{~J}$, then $Q=$
AP EAPCET 2024 - 23th May Morning Shift
4

The magnitude of an electric field which can just suspend a deuteron of mass $3.2 \times 10^{-27} \mathrm{~kg}$ freely in ari is

AP EAPCET 2024 - 22th May Evening Shift
5
Two charges 5 nC and -2 nC are placed at points $( 5 cm\mathrm{~}$ $0,0)$ and $(23 \mathrm{~cm}, 0,0)$ in a region of space where there is no other external field. The electrostatic potential energy of this charge system is
AP EAPCET 2024 - 22th May Evening Shift
6
A neutral ammonia $\mathrm{NH}_3$ in its vapour state has electric dipole moment of magnitude $5 \times 10^{-30} \mathrm{C}-\mathrm{m}$. How far apart are the molecules centres of positive and negative charge?
AP EAPCET 2024 - 22th May Morning Shift
7
If four charges $q_1=+1 \times 10^{-8} \mathrm{C}, q_2=-2 \times 10^{-8} \mathrm{C}$, $q_3=+3 \times 10^{-8} \mathrm{C}$ and $q_4=+2 \times 10^{-8} \mathrm{C}$ are kept at the four corners of a square of side 1 m , then the electric potential at the centre of the square is
AP EAPCET 2024 - 22th May Morning Shift
8
The electric field intensity $E$ at a distance of 3 m from a uniform long straight wire of linear charge density $0.2 \mu \mathrm{~cm}^{-1}$ is
AP EAPCET 2024 - 21th May Evening Shift
9
A point charge $q \mathrm{C}$ is placed at the centre of a cube of a side length $L$. Then, the electric flux linked with each face of the cube is
AP EAPCET 2024 - 21th May Morning Shift
10
Three equal electric charges of each charge $q$ are placed at the vertices of an equilateral triangle of side of length $L$. Then, potential energy of the system is
AP EAPCET 2024 - 21th May Morning Shift
11
Eight drops of mercury of equal radii and possessing equal charge combine to form a big drop. If the capacity of each drop is $C$, then capacity of the big drop is
AP EAPCET 2024 - 21th May Morning Shift
12
Three point charges $+q,+2 q$ and $+4 q$ are placed along a straight line such that the charge $+2 q$ lies at equidistant from the other two charges. The ratio of the net electrostatic force on charges $+q$ and $+4 q$ is
AP EAPCET 2024 - 20th May Evening Shift
13
A particle of mass 2 g and charge $6 \mu \mathrm{C}$ is accelerated from rest through a potential difference of 60 V . The speed acquired by the particle is
AP EAPCET 2024 - 20th May Evening Shift
14
Two spheres $A$ and $B$ of radii 4 cm and 6 cm are given charges of $80 \mu \mathrm{C}$ and $40 \mu \mathrm{C}$ respectively. If they are connected by a fine wire, the amount of charge flowing from one to the other is
AP EAPCET 2024 - 20th May Morning Shift
15
The angle between the electric dipole moment of a dipole and the electric field strength due to it on the equatorial line is
AP EAPCET 2024 - 20th May Morning Shift
16
Two particles of equal mass $m$ and equal charge $q$ are separated by a distance of 16 cm . They do not experience any force. The value of $\frac{q}{m}$ is (if $G$ is the universal gravitational constant and $g$ is the acceleration due to gravity)
AP EAPCET 2024 - 19th May Evening Shift
17
In the following diagram, the work done in moving a point charge from point $P$ to points $A, B$ and $C$ are $W_A, W_B$ and $W_C$ respectively. Then ( $A, B, C$ are points on semi-circle and point charge $q$ is at the centre of semi-circle) AP EAPCET 2024 - 19th May Evening Shift Physics - Electrostatics Question 19 English
AP EAPCET 2024 - 19th May Evening Shift
18
Two point charges $+6 \mu \mathrm{C}$ and $+10 \mu \mathrm{C}$ kept at certain distance repel each other with a force of 30 N . If each charge is given an additional charge of $-8 \mu \mathrm{C}$, the jwo charges
AP EAPCET 2024 - 18th May Morning Shift
19
In a region, the electric field is $30 \hat{\mathbf{i}}+40 \hat{\mathbf{j}} \mathrm{NC}^{-1}$, If the electric potential at the origin is zero. The electric potential at the point ( $1 \mathrm{~m}, 2 \mathrm{~m}$ ) is
AP EAPCET 2024 - 18th May Morning Shift
20

A large number of positive charges each of magnitude $$q$$ are placed along the $$X$$-axis at the origin and at every 1 cm distance in both the directions. The electric flux through a spherical surface of radius 2.5 cm centred at the origin is

AP EAPCET 2022 - 5th July Morning Shift
21

The electric field in a region of space is given as $$\mathbf{E}=\left(5 \mathrm{NC}^{-1}\right) x \hat{i}$$. Consider point $$A$$ on the $$Y$$-axis at $$y=5 \mathrm{~m}$$ and point $$B$$ on the $$X$$-axis at $$x=2 \mathrm{~m}$$. If the potentials at points $$A$$ and $$B$$ are $$V_A$$ and $$V_B$$ respectively, then $$\left(V_B-V_A\right)$$ is

AP EAPCET 2022 - 5th July Morning Shift
22

A solid sphere of radius $$R$$ carries a positive charge $$Q$$ distributed uniformly throughout its volume. A very thin hole is drilled through it's centre. A particle of mass $$m$$ and charge $$-$$q performs simple harmonic motion about the centre of the sphere in this hole. The frequency of oscillation is

AP EAPCET 2022 - 4th July Evening Shift
23

Assertion (A) In a region of constant potential, the electric field is zero and there can be no charge inside the region.

Reason (R) According to Gauss law, charge inside the region should be zero if electric field is zero.

AP EAPCET 2022 - 4th July Evening Shift
24

Statement (A) Inside a charged hollow metal sphere, $$E=0, V \neq 0$$, (where, $$E=$$ electric field, $$V=$$ electric potential).

Statement (B) The work done in moving a positive charge on an equipotential surface is zero.

Statement (C) When two like charges are brought closer, their mutual electrostatic potential energy will increase.

AP EAPCET 2022 - 4th July Evening Shift
25

Electrostatic force between two identical charges placed in vacuum at distance of $$r$$ is F. A slab of width $$\frac{r}{5}$$ and dielectric constant 9 is inserted between these two charges, then the force between the charges is

AP EAPCET 2022 - 4th July Morning Shift
26

An electric dipole with dipole moment $$5 \times 10^{-7} \mathrm{C}-\mathrm{m}$$ is in the electric field of $$2 \times 10^4 \mathrm{NC}^{-1}$$ at an angle of $$60^{\circ}$$ with the direction of the electric field. The torque acting on the dipole is

AP EAPCET 2022 - 4th July Morning Shift
27

Two positive point charges of $$10 \mu \mathrm{C}$$ and $$12 \mu \mathrm{C}$$ are placed 10 cm apart in air. The work done to bring them 6 cm closer is

AP EAPCET 2022 - 4th July Morning Shift
28

What is the electric flux for Gaussian surface $$A$$ that encloses the charged particles in free space? [Given, $$q_1=-14 \mathrm{~nC}, q_2=78.85 \mathrm{~nC}, \left.q_3=-56 \mathrm{~nC}\right]$$

AP EAPCET 2021 - 20th August Morning Shift Physics - Electrostatics Question 29 English

AP EAPCET 2021 - 20th August Morning Shift
29

Two charges 8 $$\mu$$C each are placed at the corners A and B of an equilateral triangle of side 0.2 m in air. The electric potential at the third corner C is

AP EAPCET 2021 - 20th August Morning Shift
30

Gauss's law helps in

AP EAPCET 2021 - 19th August Evening Shift
31

Charge on the outer sphere is $$q$$ and the inner sphere is grounded. The charge on the inner sphere is $$q^{\prime}$$, for $$\left(r_2 > r_1\right)$$. Then,

AP EAPCET 2021 - 19th August Evening Shift
32

Which statement(s) among the following are incorrect?

(i) A negative test charge experiences a force opposite to the direction of the field.

(ii) The tangent drawn to a line of force represents the direction of electric field.

(iii) The electric field lines never intersect.

(iv) The electric field lines form a closed loop.

AP EAPCET 2021 - 19th August Morning Shift
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