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

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Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to Answer: both the heating effect of current and hysteresis loss

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This question is part of 📚 General Knowledge within the broader 🌐 Current Affairs & GK subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.