A circular coils of 16 turns and radius 10 cm carrying a current of 0.75A a rests with its plane normal to an external field of magnitude `5.0xx10^(-2)` T the coils is free to turn about an axis in its palne perpendicular to the field direction.when the coil is turned slightly and relaesed it oscillates about its stable equilibrium with a frequency of `2.0s^(-1)` what is the moment of inertia of the coil about its axis of rotation?