Question

find an expression for potential at a point due to a point charge​

Answer 1

The potential at an infinite distance is often taken to be zero. The case of the electric potential generated by a point charge is important because it is a case that is often encountered. ... The equation for the electric potential due to a point charge is V=kQr V = kQ r , where k is a constant equal to 9.0×109 N⋅m2/C2.