Question

A bar magnet moves toward two identical parallel circular loops with a constant velocity $v$ as shown in figure

• A. Both the loops will attract each other
• B. Both the loops will repel each other
• C. The induced current in $A$ is more than that in $B$
• D. The induced current is same in both the loops
• E. answer required

Answer 1

Answer: (A), (C)

Both the loops will attract each other
The induced current in $A$ is more than that in $B$

A north pole will be formed at the incoming faces of both the coils with current flowing in anticlockwise direction.

As both the coils have current flowing in the same directions, they will attract.

Also, the induced current(emf) is directly proportional to the rate of change of magnetic flux. Therefore, as change in flux associated with coil A is more (it is nearer to the magnet), induced current will be more in coil A.