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An iron rod is subjected to cycles of magnetisation at the rate of 42 Hz. The density of the rod is 8000 kg/m3 and specific heat is 1×10−3 cal/kg ∘C. The rise in temperature per minute, if the area enclosed by the B-H loop corresponds to an energy of 1.33×10−2 J is (the nearest integer).(Assume there is no radiation losses) |
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Answer» An iron rod is subjected to cycles of magnetisation at the rate of 42 Hz. The density of the rod is 8000 kg/m3 and specific heat is 1×10−3 cal/kg ∘C. The rise in temperature per minute, if the area enclosed by the B-H loop corresponds to an energy of 1.33×10−2 J is (Assume there is no radiation losses) |
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