Question

Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. ln response, the loop-B ____________.

Options

• remains stationary

• is attracted by the loop-A

• is repelled by the loop-A

• rotates about its CM, with CM fixed. (CM is the centre of mass)

Answer 1

Two identical circular loops of metal wire are lying on a table without touching each other. Loop-A carries a current which increases with time. ln response, the loop-B is repelled by the loop-A.

Explanation:

If the current in loop A rises with time, the magnetic flux in loop B rises as well. Loop-B will be repelled by loop-A according to Lenz's law.