A circular conducting loop falls toward a bar magnet, as shown in the diagram below.

-(b) Does the magnet repel or attract the falling loop?
A) It attracts the loop.
B) It repels the loop.
C) It does not exert any force on the loop.
D) One needs more information to answer.

Question

A circular conducting loop falls toward a bar magnet, as shown in the diagram below.
 
-(b) Does the magnet repel or attract the falling loop?
A) It attracts the loop. 
B) It repels the loop. 
C) It does not exert any force on the loop. 
D) One needs more information to answer.

Quizplus · Accepted Answer

When a conductive loop falls through a magnetic field, it induces a current in the loop according to Faraday's Law of electromagnetic induction. According to Lenz's Law, the direction of the induced current is such that it opposes the change in magnetic flux that produced it. This means the induced magnetic field in the loop will oppose the external magnetic field, causing the loop to be repelled.

A Circular Conducting Loop Falls Toward a Bar Magnet, as Shown