A conducting ring is placed around the core of an electromagnet as shown in fig. When key K is pressed, the ring

Remain stationary

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Is attracted towards the electromagnet

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Jumps out of the core

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None of the above

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Solution

The correct option is C Jumps out of the core
When key k is pressed, current through the electromagnet start increasing i.e. flux linked with ring increases which produces repulsion effect.

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