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

a) one charge is positive and other is negative

b) both the charges are separated by infinite distance

c) both the charges are negative

d) both the charges are positive

Answer: one charge is positive and other is negative

Question:

a) zero

b) – 2pE

c) + 2pE

d) pE

Answer: zero

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:  I and II

Question:

a) I and III

b) I, II and II

c) Both

d) None of these

Answer:  I and III

Question:

a)

b)

c)

d)

Answer:

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: no work is done

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: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:  In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done is

a) zero along all the paths AB, AC, AD and AE

b) least along AE

c) least along the path AB

d) least along the path AD

Answer: zero along all the paths AB, AC, AD and AE

Question: Figure shows a system of three positive charges placed at the vertices of an equilateral triangle. To decrease the potential energy of the system,

a) distance between the charges should be decreased

b) a negative charge should be placed at centroid

c) a positive charge should be placed at centroid

d)

Answer: distance between the charges should be decreased

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: Assertion is incorrect, reason is correct

Question:

a) same in both the cases

b) cannot say

c) more in case of AEC

d) more in case of APB

Answer:  same in both the cases

Question:

a)

b) always a decrease in the energy of the system

c) an increase in the energy of the system

d) no change in the energy of the system

Answer:

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: 16.0 V

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:  2.24 × 10^–16 J

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: 6 × 10^–6 J