Question

Suppose there is an isolated charge (+1.5𝑥10−19𝐶) that is displaced from point A to B due to the electric force. As the charge moves, it produces an electric field which has a magnitude of 6.9 N/C. Find the work done by the electric force of the charge if it moves 1.5 m from its original position.

Answer 1

The net work done

$$W=qEd\\ =1.5*10^{-19}*6.9*1.5=1.55*10^{-18}\:\rm J$$