Derive the expression for torque on an electric dipole placed in a uniform electric field.

Explanation

Consider an electric dipole of dipole moment `p= q xx 2a` in a uniform electric field. where `q to ` magnitude of either charge and `2a to ` distance between the charges.

Let `. theta’` be the angle made by the axis of the dipole with the direction of E and `F=qE `by the magnitude of the force experienced by either charge.
The magnitude of the torque is given by
Torque = Magnitude of either force `xx` Perpendicular distance between the forces.