Question

What is potential prove

Answer 1

actually potential means capicity or tolerance to do work.
if two point a and b given
electrostatic potential between a and b in an electrostatic field is the amount of workdone in caring unit positive test charge from b to a (against the electrostatic force of the field) along any path between two point.

i.e.
Va-Vb=Wab/q
where Wab is workdone against electrostatic field and q is unit test charge