Consider the following experiment.

.

Is it true that the galvanometer shows zero deflection when the magnet is moved fast towards the current carrying coil and shows deflection once the magnet comes to rest?

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True

False

answer is B.

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Detailed Solution

The above statement is True.
In the above figure, the galvanometer shows deflection to one of its sides when the bar magnet is brought near the current carrying coil. This shows an induced current in the coil. When the bar magnet is put to rest, the deflection comes back to zero in the galvanometer. This shows that there is no induced current in the coil. When the bar magnet is moved away from the coil, the deflection in the galvanometer is towards the other side. This indicates that the direction of current flow within the coil has been reversed.
The correct statement is that the galvanometer does not show zero deflection when the magnet is moved fast towards the current carrying coil and shows deflection once the magnet comes to rest.

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