1) A point charge q is rotated along a circle in the 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 and non zero otherwise. Answer: Option AExplanation:Work done in the displacement of charge, $W = q\triangle V$ where ΔV : the potential difference between the displacement of charge Hence, work done in complete rotation is zero
