NEET Physics Electrostatic Potential and Capacitance MCQs

Question. A positively charged particle is released from rest in an uniform electric field. The electric potential energy of the charge
(a) decreases because the charge moves along the electric field
(b) increases because the charge moves along the electric field
(c) remains a constant because the electric field is uniform
(d) decreases because the charge moves opposite to the electric field

Answer: A

Question. The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements are made in this regard S₁ at any point inside the sphere, electric intensity is zero. S₂ at any point inside the sphere, the electrostatic potential is 100V. Which of the following is a correct statement?
(a) S₁ is true, S₂ is also true and S₁ is the cause of S₂
(b) None of these
(c) Both S₁ and S₂ are false
(d) S₁ is true but S₂ is false

Answer: A

Question. Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately
(a) spheres
(b) planes
(c) paraboloids
(d) ellipsoids

Answer: A

Question. The diagrams below show regions of equipotentials
(a) In all the four cases the work done is the same
(b) Minimum work is required to move q in figure (i)
(c) Maximum work is required to move q in figure (ii)
(d) Maximum work is required to move q in figure (iii)

Answer: A

Question. A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system
(a) decreases by a factor of 2
(b) remains the same
(c) increases by a factor of 2
(d) increases by a factor of 4

Answer: A

Question. Assertion : Electric potential and electric potential energy are different quantities.
Reason : For a system of positive test charge and point charge electric potential energy = electric potential.
(a) Assertion is correct, reason is incorrect
(b) Assertion is incorrect, reason is correct
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion.

Answer: A

Question. A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral
(a) A potential difference appears between the two cylinders when a charge density is given to the inner cylinder
(b) No potential difference appears between the two cylinders when a uniform line charge is kept along the axis of the cylinders
(c) A potential difference appears between two cylinders when a charge density is given to the outer cylinder
(d) None of these

Answer: A

Question. The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
(a) independent of the distance between the plates
(b) linearly proportional to the distance between the plates
(c) inversely proportional to the distance between the plates
(d) proportional to the square root of the distance between the plates

Answer: A

Question. Assertion : For a non-uniformly charged thin circular ring with net charge is zero, the electric field at any point on axis of the ring is zero.
Reason : For a non-uniformly charged thin circular ring with net charge zero, the electric potential at each point on axis of the ring is zero
(a) Assertion is incorrect, reason is correct
(b) Assertion is correct, reason is incorrect
(c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: A

Question. The electric potential at point A is 1V and at another point B is 5V. A charge 3 μC is released from B. What will be the kinetic energy of the charge as it passes through A ?
(a) 12 × 10^–6 J
(b) 4 × 10^–6 J
(c) 8 × 10^–6 J
(d) 12 × 10^–9 J

Answer: A

Question.  There is a uniform electrostatic field in a region. The potential at various points on a small sphere centred at P, in the region, is found to vary between in the limits 589.0 V to 589.8 V. What is the potential at a point on the sphere whose radius vector makes an angle of 60° with the direction of the field ?
(a) 589.4 V
(b) 589.6 V
(c) 589.2 V
(d) 589.5 V

Answer: A