An electric dipole with dipole moment 5 × 10^-6 Cm is aligned with the direction of a uniform electric field of magnitude 4 × 10^5 N / C. The dipole…

An electric dipole with dipole moment $\displaystyle 5 \times 10^{-6} \mathrm{Cm}$ is aligned with the direction of a uniform electric field of magnitude $\displaystyle 4 \times 10^5 \mathrm{~N} / \mathrm{C}$. The dipole is then rotated through an angle of $\displaystyle 60^{\circ}$ with respect to the electric field. The change in the potential energy of the dipole is :