The magnetic torque exerted on a flat current-carrying loop of wire by a uniform magnetic field is:
A)maximum when the plane of the loop is perpendicular to
B)maximum when the plane of the loop is parallel to
C)dependent on the shape of the loop for a fixed loop area
D)independent of the orientation of the loop
E)such as to rotate the loop around the magnetic field lines

Question

Quizplus · Accepted Answer

The magnetic torque is maximum when the plane of the loop is parallel to the magnetic field because the angle between the magnetic moment and the magnetic field is 90 degrees, maximizing the torque.

The Magnetic Torque Exerted on a Flat Current-Carrying Loop of Wire