Question

A point charge of magnitude 1mc is moved through a distance of 0.2m against a uniform field of 25vm^-1. Calculate the work done on the charge

Answer 1

$$\dfrac{W}{q}=Ed,$$ $$W=qEd=1.0\cdot10^{-3}\ C\cdot25\ \dfrac{V}{m}\cdot0.2\ m=5.0\cdot10^{-3}\ J.$$