1)When the current is switched on through a wire a compass needle kept nearby gets deflected from its north - soth position .Explain.What will happen to the compass needle when current is switched off ?

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Solution

The needle of the compass will again come to its initial position, i.e., in the north - south direction when the current is switched off as now no magnetic force will be experienced by it.

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What happens to the needle of a compass kept nearby when electric current is switched on in a wire? Why does this happen?

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