A copper ring of radius r and mass m hangs on the thread, making small torsional vibrations with period T. Inductance of the L ring. How will the oscillation period of the ring change if it is placed in a horizontal uniform magnetic field of induction B, parallel to the plane of the ring in the equilibrium position? The moment of inertia of the ring relative to the axis passing through the diameter is equal to J. The resistance of the ring should be ignored.