A small circular coil of 20 turns of wire lies in a uniform field of 0.5 T, so that the normal to the plane of the coil makes an angle of 60 degrees with the direction B (magnetic field with arrow over top). The radius of the coil is 4 cm, and it carries a current of 3 A.
(a) what is the magnitude of the magnetic moment of the coil?
(b) what is the magnitude of the torque exerted on the coil?