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Two circular coils are placed adjacent t...

Two circular coils are placed adjacent to each other. Their planes are parallel and currents through them `i_1` and `i_2` are in same direction. Choose the correct options.

A

when A is brought near B, current `i_2` will decrease

B

in the above process current `i_2` will increase

C

when current `i_1` is increased, current `i_2` will decrease

D

in the above process current `i_2` will increase

Text Solution

Verified by Experts

The correct Answer is:
A, C
According to Lenz's law, induced effect always oppose the changge `i_1` and `i_2` both are in same direction. Hence, magnetic lines from B due to both currents are from right to left. By bringing `A` closer to B or increasing `i_1` right to left magnetic field from B will increase. So, `i_2` should decrease.
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