A transformer is a device which:
Correct answer: C. Steps up or steps down A.C. voltage
- A. Steps up D.C voltage
- B. Steps down D.C voltage
- C. Steps up or steps down A.C. voltage
- D. None of above
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About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
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