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.
