The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say a). which of the following statements correctly depicts the phenomenon taking place

No induced emf is developed

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The end A of the solenoid behave as south pole

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The end A of the solenoid behave as north pole

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The end A of the solenoid acquires positive potential

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Solution

The correct option is C
The end A of the solenoid behave as north pole

Explanation:
It occurs in accordance with Lenz's law. To oppose the magnet's motion, end A becomes the north pole.
According to Lenz's law, In order to ensure that the original flux is maintained through the loop when current flows in it.
The induced electromotive force with different polarities induces a current whose magnetic field opposes the change in magnetic flux through the loop.
Hence, Option(C) is correct.

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