What is work done on dipole to rotate it form stable equilibrium position `(theta_(1) = 0^(@))` to unstable equilibrium `(theta_(2) = 180^(@))` ?

The work done in rotating a bar magnet of magnetic moment M from its unstable equilibrium position to its stable equilibrium position in a uniform magnetic field B is

The work done in rotating a bar magnet f magnetic moment M from its unstable equilibrium positon to its stable equilibrium position in a uniform magnetic field B is

Find the amount of work done in rotating an electric dipole of dipole moment 3.2 xx 10^(- 8) Cm from its position of stable equilibrium to the position of unstable equilibrium in a uniform electric field if intensity 10^(4) N// C .