An electric dipole of moment 'p' is placed in an electric field of intensity 'E'. The dipole acquires a position such that the axis of the dipole…

An electric dipole of moment 'p' is placed in an electric field of intensity 'E'. The dipole acquires a position such that the axis of the dipole makes an angle $\displaystyle \theta$ with the direction of the field. Assuming that the potential energy of the dipole to be zero when $\displaystyle \theta=90^{\circ}$, the torque and the potential energy of the dipole will respectively be :