Transformer works on the principle of
Correct answer: C. Mutual induction
- A. Half wave rectification
- B. Self-induction
- C. Mutual induction
- D. Full wave rectification
Explanation
The transformer works on the principle of Faraday's law of electromagnetic induction and mutual induction. There are usually two coils: primary coil and secondary coil on the transformer core.
This question appeared on the NUMS 2022 paper, which you can sit online with every answer explained.
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About Transformers
Transformers transfer alternating electrical energy between coils by mutual induction, with voltage ratio determined by the turns ratio. The topic covers step-up and step-down transformers, current changes, ideal power conservation and practical losses such as heating and flux leakage. A transformer requires changing magnetic flux, so it does not operate with steady direct current.
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