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Why Inductor has the effect of eddy currents?

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CQCQ

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Why Inductor has the effect of eddy currents?

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vfone

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When an inductor is energized with AC, the alternating magnetic fields produced tend to induce circulating currents within the core of the inductor. These are eddy currents.
The amount of eddy current is proportional to the product of the frequency of the changing magnetic flux and the magnetic flux density.
 

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