Question
When the current is switched ON through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.
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Answer
When the current is switched ON through a wire or a coil, there is a magnetic field created around the coil or wire and we can say that the wire or coil gets magnetised. Thus, a compass needle kept nearby gets deflected from its north-south position due to other magnet formed by current carrying wire or coil.
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