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Question

To induce an emf in a coil, the magnetic flux linked with the coil should _________.

A
Increase
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B
Decrease
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C
Remain constant
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D
Either (1) or (2)
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Solution

The correct option is D Either (1) or (2)
We know that according to Faraday's Law when the magnetic flux linking a coil changes, an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage. So, to induce an emf in a coil, the magnetic flux linked with the coil should be changed and for that magnetic flux either should increase or decrease.
Therefore, D is corrrect option.

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