Emf produced by A.C generator depends upon:
Correct answer: D. All the above
- A. Magnetic field strength
- B. Number of turns in the coil
- C. Frequency of rotation
- D. All the above
Explanation
The electromotive force (emf) produced by an AC generator depends upon all the above factors:Magnetic field strength: The strength of the magnetic field affects the magnitude of the induced emf. A stronger magnetic field can induce a higher emf in the generator's coils.Number of turns in the coil: The emf induced in the coil is directly proportional to the number of turns in the coil. More turns result in a higher induced emf.Frequency of rotation: The frequency of rotation, or the speed at which the coil rotates within the magnetic field, affects the rate at which the magnetic flux changes. A higher frequency of rotation leads to a higher rate of change of magnetic flux, resulting in a higher induced emf.
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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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