A current-carrying loop of wire experiences no tendency to rotate in a magnetic field when

Question

Quizplus · Accepted Answer

According to Fleming's left-hand rule, a current-carrying loop experiences a torque when it is placed in a magnetic field and the field lines are not parallel to the plane of the loop. The direction of the torque is given by the direction of the force on each segment of the loop as per the rule. If no field lines pass through the loop, there would be no forces on the segments of the loop and hence no torque. Hence, the loop would not experience a tendency to rotate.

A Current-Carrying Loop of Wire Experiences No Tendency to Rotate