Obtain an expression for the electric field intenstiy at a point on the equatorial line of an electric dipole.

Why is that electric field intensity at a point on the equatorial line due to an electric dipole taken as negative?

Give the expression for magnetic field at a point on the equatorial line of a magnetic dipole.

Write the expression for the electric field at a point on the perpendicular bisector due to a short electric dipole. Give the meaning of the symbols used.

What is an electric dipole ?

Give an expression for the electric potential at a point due to a point charge.