Question

An electric dipole is held in uniform electric field (1)show that net force acting on it is zero (2) find the torque acting on dipole and specify its direction (3) if the dipole is aligned paraller to the field .find the work done in rotating through the angle of 180

Answer 1

An electric dipole is placed in a uniform electric field.
(i) Show that no translatory force acts on it.
(ii) Derive an expression for the torque acting on it.
(iii) Find work done in rotating the dipole through 180°.