A loop of current-carrying wire is in a 1.6-T magnetic field.
(a) For the magnetic torque on the loop to be at a maximum, should the plane of the coil be (1) parallel, (2) perpendicular, or (3) at a 45o angle to the magnetic field? Explain.
(b) If the loop is rectangular with dimensions 20 cm by 30 cm and carries a current of 1.5 A, what is the magnitude of the magnetic moment of the loop, and what is the maximum torque?
(c) What would be the angle(s) between the magnetic moment vector and the magnetic field direction if the loop felt only 20% of its maximum torque?