The motional emf produced in a conductor depends upon:
Correct answer: D. All of the above
- A. Magnetic field
- B. Length
- C. Material of the conductor
- D. All of the above
Explanation
The motional electromotive force (emf) produced in a conductor depends upon all of the above factors:Magnetic field: The strength of the magnetic field through which the conductor moves affects the magnitude of the induced emf. A stronger magnetic field induces a higher emf in the conductor.Length: The length of the conductor within the magnetic field also influences the induced emf. A longer conductor typically results in a higher induced emf, provided other factors remain constant.Material of the conductor: The material of the conductor affects its electrical properties, such as conductivity and resistance, which can influence the magnitude of the induced emf. Different materials may exhibit different responses to the magnetic field and, consequently, produce different levels of emf when subjected to the same conditions.
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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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