For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10mA is passed through it. If t…

For a moving coil galvanometer, the deflection in the coil is 0.05 rad when a current of 10mA is passed through it. If the torsional constant of the suspension wire is \(4.0\times {10}^{-5}\)Nm rad^–1, the magnetic field is 0.01T and the number of turns in the coil is 200, the area of each turn (in \({\mathrm{cm}}^{2}\) ) is: