when the current is switched on through a wire a compass needle kept nearby gets deflected from its north south position and explain.
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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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When current is switched on, the wire emits magnetic field around it.
The compass also acts like a bar magnet with north and south pole. Thus, when it is brought near the wire, the magnetic field of the wire deflects the compass.
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