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Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?

7. Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?

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No, Because in the above circuit diagram there is no source of current supply like battery or cell. In the absence of current wire will not act as a magnet, and hence needle will not show any deflection.

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