The magnetic field of 50 A / m are freedoms

The magnetic field of 50 A / m are freely rotating flat frame cross-sectional area of 10 cm ^ 2. The plane of the first frame coincides with the direction of the magnetic field induction. Then, a frame passed a current of 1 A and frame received angular acceleration 100 ^ 2. Assuming that the torque constant, find the moment of inertia of the frame.