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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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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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As we know that the needle of a compass is a tiny magnet, which points in north-south direction. When we bring a magnet close to it, the needle gets deflected. Also, when an electric current flows through a wire, it produces magnetic effect around it. Therefore, when the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position due to magnetic effect of electric current around the wire.

 

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