NEET Physics Electrostatic Potential and Equipotential Surfaces MCQs

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: A

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: A

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: A

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: A

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: A

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: A

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: A

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: A

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: A

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: A

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: A

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: A