An electric dipole of dipole moment 1.0 × 10^-12 Cm lies along x -axis. An electric field of magnitude 2.0 × 10^4 NC^-1 is switched on at an instant…

An electric dipole of dipole moment $\displaystyle 1.0 \times 10^{-12} \mathrm{Cm}$ lies along x -axis. An electric field of magnitude $\displaystyle 2.0 \times 10^{4} \mathrm{NC}^{-1}$ is switched on at an instant in the region. The unit vector along the electric field is $\displaystyle \frac{\sqrt{3}}{2} \hat{\mathrm{i}}+\frac{1}{2} \hat{\mathrm{j}}$. The magnitude of the torque acting on the dipole at that instant is :