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Answer Posted / avinash
Alternating magnetising current keeps reversing direction twice per cycle. Hysteresis is property of magnetic material due to which the induced magnetic field reverses but with a magnetization gap called hysteresis. During the delay there is no induction of magnetic field to secondary current hence loss of output called hysteresis loss. It is a loss of energy that does not appear at the output. Where does it go? It goes as heat, and that is not a good sign.
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