Question

what is the work done in moving a 100 micro C through a distance of 1 cm along the equatorial line of dipole

Answer 1

1. Equipotential surfaces are surfaces having same potential at every point on its surface. As the potential at two points on an equipotential surfaces is same, the work done in moving a charge of 10 μ C from any point on the equipotential surface to any other point on the equipotential surface is zero.

2. According to Gauss law we know that the total electric flux out of a closed surface is equal to the charge enclosed divided by the permitivity.

i.e.