A coil of 10 cm x 20 cm having 40 turns in making 18.00 rev/min in a magnetic field 0.5 wb/m2. The peak value of the induced emf is:
Correct answer: A. 113volt
- A. 113volt
- B. 226 volt
- C. 339 volt
- D. 452 volt
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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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