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Question

A magnet is dropped freely towards a loop of copper wire as shown in figure. The acceleration of magnet will be:
330757_5493dc0f9e2e47f3a68c7feadad09192.png

A
equal to 9
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B
greater than gless than g
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C
less than g
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D
zero
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Solution

The correct option is C less than g
Answer is C.

When the magnet approaches the ring, the magnetic flux linked with the ring changes. Thus, induced current flow in the ring. The direction of induced current is such that it opposes the cause which produces it. The acceleration of magnet will be lesser than the acceleration due to gravity as there is an induced force acting on it.

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