Derive the equation for the motion of a moving coil galvanometer when critically damped. A moving-coil galvano-meter has a coil wound upon a former 2 of non-conducting material. The current sensitivityd of the instrument is 0.001A/mm at Im and the undamped periodic time is 5.0s. If the torque per ampere is 0.0632 N-m, calculate the control torque of the suspension, the moment of inertia of the moving system, and the total circuit resistance which critically damps the instrument the leffect of air damping can be neglected.muien o.b lo lioo gnivom or dguondh