explain why,when the current is switched on through a wire , the needle of a compass kept nearby gets deflected from its north-south position.
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this is due to magnetic field around the conductor carrying current
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When a current is switched on through a wire, the wire starts behaving as a magnet. Hence, when a compass needle is placed near the given current carrying wire, it gets influenced by the magnetic effect of electric current and gets deflected from its North- South position.
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