Equipotential surface—

Any surface which has same electric potential at every point is called an equipotential surface

Electric Potential due to a Point Charge—

Let us consider a point charge +q placed at point O.

Suppose that at any instant q₀ is at P at the distance‘r’ from ‘O’. If E be the electric field intensity at P. then,

Relation between Electric Field and Potential

Electric Potential at any point due to an Electrical Dipole—

Let us consider an electric dipole AB. Let O be the centre of Dipole and P be point at a distance ‘r’, where potential is to Be determined.