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Question

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

A
none of the above
B
remains stationary
C
is attracted towards the electromagnet
D
jumps out the core
Solution
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Correct option is C. jumps out the core
When key $$K$$ is pressed, current through the electromagnet start increasing i.e., flux linked with ring increase which produces repulsion effect. So, it jumps out of the core,
Hence, option C is the answer.

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