Question

derivation of electric field on axial line of an electric dipole​

Answer 1

A line passing through the positive and negative charges of the dipole is called the axial line of the electric dipole. Consider a point P on the axial line of a dipole (situated in a vacuum) of length 2a at a distance r from the midpoint O. Let overrightarrow{E} be the resultant electric intensity at P.