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In the diagram shown, a uniform magnetic field is present perpendicular to the plane of the paper. Both the rings are identical, lie in the plane of paper and have a uniform resistance per unit length. The left ring has been kept fixed at its position and the right ring is slid uniformly on the left ring towards the right hand side. Which of the following statements is/are true ?

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The emf induced in the left ring is zero.

The magnetic force acting on the right ring is zero.

The emf induced in both the rings is non-zero.

The magnetic force acting on both the rings is non-zero.

answer is A, D.

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Detailed Solution

Simplified diagram may be

So there will be current in each ring and so magnetic force on them will be nonzero and they will be inwards according to Lenz’s law.

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