e ,  on a plane perpendicular to the dipole axis through its centre The
electric field at any general point P is obtained by adding the electric
fields E–q due to the charge –q and E+q due to the charge q, by the
parallelogram law of vectors (i) For points on the axis
Let the point P be at distance r from the centre of the dipole on the side of
the charge q,  as shown in Fig