The switch S in the adjoined circuit is closed and then opened. The closed loop will show

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an anticlockwise current pulse and then an anticlockwise current pulse

a clockwise current pulse and then an anticlockwise current pulses

a clockwise current pulse

an anticlockwise current pulse

answer is D.

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Detailed Solution

During closing the switch, increasing current in the main circuit will flow in downward direction. This will induce magnetic field through the coil in outward direction. To counter this increasing magnetic field, current pulse will induced in the coil in clockwise direction. Similarly, during opening of switch, current will decrease, which will decrease the magnetic field through the coil. To counter this, the current pulse will induced in anticlockwise direction.

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