Question

A point charge q is rotated along a circle in an electric field generated by another point charge Q. The work done by the electric field on the rotating charge in one complete revolution is
(a) zero
(b) positive
(c) negative
(d) zero if the charge Q is at the centre, otherwise non-zero

Answer 1

Answer:

negative will be the answer

Answer 2

(a) is correct.

Explanation:

• The electrostatic field is conservative and the fieldwork is a function of the State, i.e.
• This depends only on the final and initial place of the charge but not on the direction that it takes.
• The charge occupies the same final position and initial positions after completing one revolution.
• Thus the field's work done on moving the charge in a complete Movement Now is zero.