There are two coils A and B as shown in the f | vedclass

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(A) According to Lenz's Law,the induced current in a coil always opposes the change in magnetic flux that produced it.In this setup,coil $A$ is rotati

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Current is clockwise.

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(A) According to Lenz's Law,the induced current in a coil always opposes the change in magnetic flux that produced it.In this setup,coil $A$ is rotating,which changes the magnetic flux linked with coil $B$,inducing a current in $B$.If the induced current in coil $B$ is counterclockwise,it creates a magnetic field directed towards the observer (out of the plane).To oppose this,the change in flux caused by coil $A$ must be such that it induces this counterclockwise current in $B$.Since the rotation of $A$ is causing the flux change,the current in $A$ must be such that it creates a magnetic field that is being opposed by $B$.By applying the right-hand rule and Lenz's Law,for the induced current in $B$ to be counterclockwise,the current in $A$ must be clockwise at that instant to create a flux that is decreasing or changing in a way that $B$ opposes.

There are two coils $A$ and $B$ as shown in the figure. No current flows in $B$ if $A$ is at rest. Now,the coil $A$ is made to rotate about a vertical axis. At the shown instant $(t = 0)$,what will be the direction of the current in coil $A$ if the induced current in coil $B$ is counterclockwise?

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