NEET Physics Electric Potential Energy and Work done in Carrying a Charge MCQs

Question. Which of the following about potential difference between any two points is true?
I. It depends only on the initial and final position.
II. It is the work done per unit positive charge in moving from one point to other.
III. It is more for a positive charge of two units as comparedto a positive charge of one unit.
(a) I and II
(b) I only
(c) II only
(d) I, II and III

Answer: A

Question.  If a unit positive charge is taken from one point to another over an equipotential surface, then
(a) no work is done
(b) work done is constant
(c) work is done on the charge
(d) work is done by the charge

Answer: A

Question. Assertion : For a charged particle moving from point P to point Q, the net work done by an electrostatic field on the particle is independent of the path connecting point P to point Q.
Reason : The net work done by a conservative force on an object moving along a closed loop is zero.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct

Answer: A

Question. Assertion: The electric potential at any point on the equatorial plane of a dipole is zero.
Reason: The work done in bringing a unit positive charge from infinity to a point in equatorial plane is equal for the two charges of the dipole
(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. A and B are two points in an electric field. If the work done in carrying 4.0C of electric charge from A to B is 16.0 J, the potential difference between A and B is
(a) 16.0 V
(b) 4.0 V
(c) 2.0 V
(d) zero

Answer: A

Question. Two points P and Q are maintained at the potentials of 10 V and – 4 V, respectively. The work done in moving 100 electrons from P to Q is:
(a) 2.24 × 10^–16 J
(b) 9.60 × 10^–17J
(c) –2.24 × 10^–16 J
(d) –9.60× 10^–17 J

Answer: A

Question. A ball of mass 1 g carrying a charge 10^–8 C moves from a point A at potential 600 V to a point B at zero potential. The change in its K.E. is
(a) 6 × 10^–6 J
(b) – 6 × 10^–6 erg
(c) – 6 × 10^–6 J
(d) 6 × 10^–6 erg

Answer: A