A dipole with two electric charges of 2 μ C magnitude each, with separation distance 0.5 μ m, is placed between the plates of a capacitor such that…

A dipole with two electric charges of $\displaystyle 2 \mu \mathrm{C}$ magnitude each, with separation distance $\displaystyle 0.5 \mu \mathrm{~m}$, is placed between the plates of a capacitor such that its axis is parallel to an electric field established between the plates when a potential difference of $\displaystyle 5$ V is applied. Separation between the plates is $\displaystyle 0.5$ mm . If the dipole is rotated by $\displaystyle 30^{\circ}$ from the axis, it tends to realign in the direction due to a torque. The value of torque is :