Q. Two identical circular loops of metal wire are lying on a table. Loop $A$ carries a current which increases with time. In response, the loop $B$
A) Is attracted by the loop $B$
B) Is repelled by the loop $A$
C) Remains stationary
D) None of the above
Explanation
(c) As per the phenomenon of mutual induction when two coils are placed near each other and current is passed through one of them then due to the phenomenon of electromagnetic induction current is induced in the other coil, in this case since, current in loop $A$ increases with time, hence direction of current induced in loop $B$ will be same as direction of current in loop $A.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.