When the rate of change of current in a coil is unity then the induced emf is equal to:
Correct answer: C. Coefficient of self inductance
- A. Number of turns of the coil
- B. Total flux linked with the coil
- C. Coefficient of self inductance
- D. None of the above
Explanation
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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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