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Question

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



A

Remain stationary

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B

Is attracted towards the electromagnet

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C

Jumps out of the core

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D

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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