Large transformers, when used for some time, become hot and are cooled – McqOptions

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1.	Large transformers, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is due to [MP PET 2001]
A.	Heating effect of current alone
B.	Hysteresis loss alone
C.	Both the hysteresis loss and heating effect of current
D.	None of the above
Answer» D. None of the above

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