Work done in moving a positive charge on an equipotential surafce is

Work done in moving a positive charge on an equipotential surface is

The work done in moving a positive charge on an equipotential surface is:

No work is done in moving a test charge over an equipotential surface. Why?

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

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

The amount of work done to move a positive point charge q on an equipotential surface of 1000 V relative to that on an equipotential surface of 10 V is