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Q.

A and B are two metallic rings placed at opposite sides of an infinitely long straight conducting wire as shown in figure. If current in the wire is slowly decreased, the direction of the induced current will be

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a

clockwise in A and anticlockwise in B

b

anticlockwise in A and, clockwise in B

c

clockwise in both A and B

d

anticlockwise in both A and B

answer is B.

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Detailed Solution

The magnetic flux linked in both coils decreases. In coil A flux outward and in B inward.from len’z law the induced current will oppose the cause of change in flux,Hence in coil A current is Anti-clockwise and in coil B Clockwise.
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