Read the following paragraph and answer the questions:
Total amount of work done in bringing the different charges to their respective positions from infinitely large mutual separation is defined as Electrostatic potential energy of a system.
Work done in carrying charge to any point from infinity is product of potential and charge:
W Potential `xx` Charge
This work is stored in the system of two point charges in the form of electrostatic potential energy U of the system.

In a uniformly charged conducting sphere, W in moving a charge from point A to point B is

Options

A. Always zero
B. May be zero
C. Non-zero
D. Both (a) and (b)

Answer

A

Explanation

always Zero
Explanation: Since, E = 0 inside the conductor and has no tangential component, no work is done in moving a small test charge within the conductor and on its surface.