A current carrying circular ring, when placed in a uniform magnetic field of 0.25 T with one diameter perpendicular to the field experiences a torque of 0.3 N-m, when the ring is rotated about this diameter through an angle of , it experiences a torques of 0.4 N-m. Then magnetic dipole moment of the ring is
Where is the angle between
When the ring is rotated, new angle between is .