Question

A small particle of charge q is displaced from the centre of a uniformly charged solid sphere of radius R and charge Q to an outside point at a distance R from the surface of sphere... Find the word done.

Answer 1

if work done is assumed to be w
then work done in first case "0"(for charge q) becuse displaced from center
work done in second case w(for charge Q)
therefore net Work= w+0=w