A short bar magnet placed with its axis at 30^° with an external field of 800 Gauss, experiences a torque of 0.016 N. m. The work done in moving it…

A short bar magnet placed with its axis at $\displaystyle 30^{\circ}$ with an external field of $\displaystyle 800$ Gauss, experiences a torque of $\displaystyle 0.016 \mathrm{~N} . \mathrm{m}$. The work done in moving it from most stable to most unstable position is $\displaystyle \alpha \times 10^{-3} \mathrm{~J}$. The value of $\displaystyle \alpha$ is $\displaystyle \_\_\_\_$.