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. In response, the loop B

Options

A. remains stationary
B. is attracted by the loop - A
C. is repelled by the loop - A
D. rotates about its CM, with CM fixed (CM is the centre of mass)

Answer

C

Explanation

If the current increases with time in loop A, then magnetic flux in B will increase. According to Lenz.s law, loop - B is repelled by loop - A because current in loop B will be antiparallel to that in A.