Why does a metallic piece become very hot when it is surrounded b… - Vidyadip

Question

Why does a metallic piece become very hot when it is surrounded by a coil carrying high frequency alternating current?

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Answer

Due to flow of high frequency alternating current in the coil, the magnetic flux linked with the metallic piece changes by a large amount, so heavy eddy currents are induced in the metallic piece. These currents cause metallic piece to get heated.

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