A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will

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Keep oscillating with the old time period

Keep oscillating with a smaller time period

Keep oscillating with a larger time period

Come to rest very soon

answer is D.

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Detailed Solution

Emf induces in ring and it will opposes the motion. Hence due to the resistance of the ring all energy dissipates.

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