Question

Suppose the is an isolated charge (+1.5×10^-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 original charge if it moves 1.5m from its original position

Answer 1

The work done by an electric field

$$W=qEd\\ =\rm 1.5*10^{-19}\: C*6.9\: N/C*1.5\: m=1.6*10^{-18}\: J$$