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 coil $B$ will oppose the change in magnetic flux linked with it. Given that the induced current in

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current is clockwise

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(A) According to Lenz's law,the induced current in coil $B$ will oppose the change in magnetic flux linked with it. Given that the induced current in coil $B$ is counterclockwise,it creates a magnetic field directed towards the observer (out of the plane). This induced magnetic field must oppose the increase in magnetic flux caused by the rotation of coil $A$. For the induced current in $B$ to be counterclockwise,the magnetic flux through $B$ must be increasing. This implies that the magnetic field produced by coil $A$ at the location of $B$ must be increasing. For the magnetic flux to increase,the current in coil $A$ must be such that it produces a magnetic field in the same direction as the induced field in $B$. By applying the right-hand thumb rule,a counterclockwise current in $B$ corresponds to a magnetic field pointing out of the plane. Therefore,the current in coil $A$ must be clockwise to produce a magnetic field that is initially increasing in the direction that induces a counterclockwise current in $B$ as it rotates.

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 $A$,when the induced current in coil $B$ is counterclockwise?

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