Question

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

Answer 1

Answer:

C. both the heating effect of current and hysteresis loss

The heating of the transformer is due to both the heating effect of current and hysteresis loss.