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Why and where are eddy currents undesirable ? How are they minimized ?

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Why and where are eddy currents undesirable ? How are they minimized ?

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Eddy currents result in generation of heat (energy loss) in the cores of transformers, motors, induction coils, etc.

To minimize the eddy currents, instead of a solid metal block, cores are made of thin insulated metal strips or laminae.

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