The unit of induced emf is:
Correct answer: D. Both (b) and (c)
- A. Ampere
- B. Volt
- C. Joule/coulomb
- D. Both (b) and (c)
Explanation
The unit of induced electromotive force (emf) can indeed be expressed as both Volt and Joule/coulomb.Volt (V): The volt is the standard unit of electric potential difference and electromotive force (emf). It is defined as one joule of energy per coulomb of charge.Joule/coulomb (J/C): This unit represents the energy per unit charge. In the context of induced emf, it signifies the energy transferred per unit charge as a result of the induced voltage.
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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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