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(C) According to Faraday's law of electromagnetic induction,an induced current is produced in a coil when the magnetic flux linked with it changes.Whe

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there are momentary galvanometer deflections that die out shortly; the deflections are in opposite directions

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(C) According to Faraday's law of electromagnetic induction,an induced current is produced in a coil when the magnetic flux linked with it changes.When the key is inserted,the current in the first coil increases from zero to a steady value,causing the magnetic field linked with the second coil to change,which induces a momentary current in the second coil,resulting in a deflection in the galvanometer.Once the current becomes steady,the magnetic flux becomes constant,and the deflection drops to zero.When the key is removed,the current in the first coil decreases from its steady value to zero,causing the magnetic flux linked with the second coil to change again,but in the opposite direction,which induces a momentary current in the opposite direction,resulting in a deflection in the opposite direction in the galvanometer.

In the arrangement shown in the figure,there are two coils wound on a non-conducting cylindrical rod. Initially,the key is not inserted. Then the key is inserted and later removed. Then

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