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इंडियन गवर्नमेंट एग्जाम प्रेप

Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

A the heating effect of current alone
B hysteresis loss alone
C both the heating effect of current and hysteresis loss
D intense sunlight at noon
Correct Answer: C
Solution & Explanation
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