NEET Physics Electrostatic Potential and Equipotential Surfaces MCQs

a) remains constant from centre to surface

b) decreases from centre to surface

c) increases from centre to surface

d) is zero at every point inside

Answer: remains constant from centre to surface

Question: It becomes possible to define potential at a point in an electric field because electric field

a) is a conservative field

b) is a non-conservative field

c) is a vector field

d) obeys principle of superposition

Answer: is a conservative field

Question:  Which of the following about potential at a point due to a given point charge is true ?

The potential at a point P due to a given point charge

a) is a function of distance from the point charge

b) varies inversely as the square of distance from the point charge

c) is a vector quantity

d) is directly proportional to the square of distance from the point charge

Answer: is a function of distance from the point charge

Question: Which of the following quantities do not depend on the choice of zero potential or zero potential energy?

a) Potential difference between two points

b) Potential at a point

c) Potential energy of a two-charge system

d) None of these

Answer: Potential difference between two points

Question: A cube of a metal is given a positive charge Q. For this system, which of the following statements is true?

a) Electric field varies within the cube

b) Electric field is normal to the surface of the cube

c) Electric potential within the cube is zero

d) Electric potential at the surface of the cube is zero

Answer: Electric field varies within the cube

Question:  A unit charge moves on an equipotential surface from a point A to point B, then

a)

b)

c)

d) it is stationary

Answer:

Question: The electric potential at a point on the equatorial line of an electric dipole is

a) directly proportional to distance

b) inversely proportional to distance

c) inversely proportional to square of the distance

d) None of these

Answer:  directly proportional to distance

Question:

a)

b)

c)

d)

Answer:

Question: Figure below shows a hollow conducting body placed in an electric field. Which of the quantities are zero inside the body?

a) Electric field and charge density

b) Electric potential and charge density

c) Electric field, potential and charge density.

d) Electric field and potential

Answer:  Electric field and charge density

Question: The value of electric potential at any point due to any electric dipole is

a)

b)

c)

d)

Answer:

Question: A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is

a) 10 V

b) 4 V

c) 10/3 V

d) zero

Answer: 10 V

Question:

a) 4 V

b) zero

c) 6.4 V

d) –4 V

Answer:  4 V

Question:

a) +2

b) –1

c) –2

d) zero

Answer: +2

Question:

a) 40 eV

b) – 50 eV

c) – 40 eV

d) 50 eV

Answer: 40 eV

Question:  Consider the following statements and select the correct option
I. In an external electric field, the positive and negative charges of a non–polar molecule are displaced in opposite directions.
II. In non –polar molecules displacement stops when the external force on the constituent charges of the molecule is balanced by the restoring force.
III. The non–polar molecule develops an induced dipole moment

a) I, II and III

b) II and III

c) I and II

d) I and III

Answer:  I, II and III

Question:

a) maximum at B

b) maximum at C

c) same at all the three points A, B and C

d) maximum at A

Answer: maximum at B

Question:

a) negative to positive

b) does not change

c) positive to negative

d) positive to zero

Answer: negative to positive

Question:

a)

b)

c)

d)

Answer:

Question: Consider the following statements and select the correct statement(s).
I. Electric field lines are always perpendicular to equipotential surface.
II. No two equipotential surfaces can intersect each other.
III. Electric field lines are in the direction of tangent to an equipotential surface.

a) I and II

b) I only

c) II only

d) I, II and III

Answer:  I and II

Question:

a) charge will flow from B to A

b) charge oscillates between A and B

c) charge will flow from A to B

d) no charge will flow

Answer:  charge will flow from B to A

Question:  Which of the following figure shows the correct equipotential surfaces of a system of two positive charges?

a)

b)

c)

d)

Answer:

Question: Assertion : Electric field is discontinuous across the surface of a spherical charged shell.
Reason : Electric potential is continuous across the surface of a spherical charged shell.

a) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

b) Assertion is correct, reason is incorrect

c) Assertion is incorrect, reason is correct

d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is correct; reason is not a correct explanation for assertion

Question:  Two equally charged spheres of radii a and b are connected together. What will be the ratio of electric field intensity on their surfaces?

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) zero

b) 2

c) 9

d) 4.5

Answer:  zero

Question:

a)

b)

c)

d)

Answer:

Question: Four points a, b, c and d are set at equal distance from the centre of a dipole as shown in figure. The electrostatic potential V_a, V_b, V_c, and V_d would satisfy the following relation:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) decrease in potential is steepest

b) increase in potential is steepest

c) change in potential is minimum

d) None of these

Answer:  decrease in potential is steepest

Question:

a)

b)

c)

d)

Answer:

Question:  A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are

a)

b)

c)

d) Both are 0

Answer:

Question:

a)

b)

c)

d) zero

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question: From a point charge, there is a fixed point A. At A, there is an electric field of 500 V/m and potential difference of 3000 V. Distance between point charge and A will be

a) 6 m

b) 12 m

c) 16 m

d) 24 m

Answer: 6 m

Question: Two metal pieces having a potential difference of 800 V are 0.02 m apart horizontally. A particle of mass 1.96 × 10^–15 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is

a) 3

b) 0.1

c) 6

d) 8

Answer: 3

Question:

a)

b)

c)

d) None of these

Answer:

Question: The 1000 small droplets of water each of radius r and charge Q, make a big drop of spherical shape. The potential of big drop is how many times the potential of one small droplet ?

a) 100

b) 1000

c) 10

d) 1

Answer: 100

Question:  The electric potential at a point (x, y) in the x – y plane is given by V = – kxy. The field intensity at a distance r from the origin varies as

a) r

b) r²

c)

d)

Answer:  r

Question:

a) 270 V

b) 300 V

c) Zero

d) 100 V

Answer:  270 V