An electric dipole of dipole moment ( p ) is kept in a uniform electric field E. Show graphically the variation of torque acting on the dipole (τ)…

An electric dipole of dipole moment $\displaystyle (\vec{p})$ is kept in a uniform electric field $\displaystyle \vec{E}$. Show graphically the variation of torque acting on the dipole $\displaystyle (\tau)$ with its orientation $\displaystyle (\theta)$ in the field. Find the orientation in which torque is (i) zero and (ii) maximum.