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