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Physics - Section 1 :: Discussion
| 5. | 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 | |
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