Work done in carrying an electron from A to B lying on an equipotential surface of one volt potential is

Find out equipotential surface where potential is zero ?

The work done in carrying an electron from point A to a point B in an electric is 10 MJ. The potential difference (V_(B)-V_(A)) is then

What is the work done in moving a charge between two points on an equipotential surface?

The amount of work done in moving a charge from one point to another in an equipotential surface is _____ ?

No work is done in moving a test charge over an equipotential surface, why?