If the number of flux passing through a coil per unit time is doubled then the motion emf?
Correct answer: C. Doubles
- A. Halves
- B. Triples
- C. Doubles
- D. Remains unchanged
Explanation
According to Faraday's Law of Electromagnetic Induction, the induced electromotive force (EMF) in a coil is equal to the rate of change of magnetic flux through the coil. Mathematically, this is expressed as emf = ΔØ/Δt. If the magnetic flux passing through the coil per unit time is doubled, the rate of change of flux is also doubled, hence the induced EMF doubles. Therefore, Option C is correct. The other options are incorrect because they misinterpret the relationship between flux change and induced EMF. Halving or tripling the EMF would require corresponding changes in the flux rate, which doesn't align with the scenario described in the question.
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About Faraday's Law
Faraday's law states that an induced electromotive force equals the rate of change of magnetic flux linkage through a circuit. Questions cover changing field, area, angle or motion, the negative sign associated with Lenz's law, and the distinction between induced emf and the current that may flow in a closed circuit.
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