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Two identical coils A and B are kept on ...

Two identical coils A and B are kept on a horizontal tube side by side without touching each other. If the current in the coil A increases with time, in response, the coil B

A

is attracted by A

B

remains stationary

C

is repelled

D

rotates

Text Solution

Verified by Experts

The correct Answer is:
C
As the current in coil A changes, the magnetic flux linked with coil B changes. Direction of flux in B will be downwards, hence current induces in coil B is in anti-clockwise direction according to Lenz's law.
The direction of induced current in coil B is opposite to that of the direction of current in coil A as shown in figure.

Due to currents in opposite directions in the near by sides of the coils, the coil B is repelled.
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