Electro Magnetic Induction And Alternating Currents Question 314

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. In response, the loop-B [IIT JEE 1999; UPSEAT 2003]

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)

Show Answer

Answer:

Correct Answer: C

Solution:

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.



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