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Question

In the given figure, the galvanometer will not have a deflection if:​


A

the bar magnet is moved in the direction shown

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B

the bar magnet is moved in the opposite direction

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C

the bar magnet is kept stationary

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D

the wire loop on the conducting cylinder is moved towards the bar magnet

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Solution

The correct option is C

the bar magnet is kept stationary


An emf would be induced in the coil if there is a change in the magnetic flux. This can happen if the bar magnet and the coil move relative to each other i.e. if the bar magnet moves towards/away from the coil or the coil moves towards/away from the bar magnet. But if neither the bar magnet nor the coil moves then the induced current is zero.


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