What are eddy currents? How are these produced? In what sense are eddy currents undesirable in a transformer and how are these reduced in such a device?
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Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC electromagnet or transformer, for example, or by relative motion between a magnet and a nearby conductor.
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