Q.

The metallic ring shown in figure is suspended by an insulated thread and a bar magnet is held stationary inside the ring. If the magnet is quickly taken out of the ring to the right, then

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a

The ring will remain stationary

b

The ring will rotate about its vertical diameter

c

The ring will swing to the right

d

The ring will swing to the left.

answer is C.

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Detailed Solution

Clockwise current (as viewed from left) will be induced in the ring. As result the left face of the ring will behave like a south pole and the right face will behave like a north pole. So the net magnetic force on the ring will point in the right and the ring will swing to the right.
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