A moving coil galvanometer has 100 turns and each turn has an area of 2.0 cm^2. The magnetic field produced by the magnet is 0.01 T and the…

A moving coil galvanometer has $\displaystyle 100$ turns and each turn has an area of $\displaystyle 2.0 \mathrm{~cm}^2$. The magnetic field produced by the magnet is $\displaystyle 0.01$ T and the deflection in the coil is $\displaystyle 0.05$ radian when a current of $\displaystyle 10$ mA is passed through it. The torsional constant of the suspension wire is $\displaystyle x \times 10^{-5} \mathrm{~N}-\mathrm{m} / \mathrm{rad}$. The value of $\displaystyle x$ is $\displaystyle \_\_\_\_$.