Derive an expression for the electric field E due to a dipole of

length ‘2a’ at a point distant r from the centre of the dipole on the

axial line.

(b) Draw a graph of E versus r for r >> a.

*×*

length ‘2a’ at a point distant r from the centre of the dipole on the

axial line.

(b) Draw a graph of E versus r for r >> a.