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Question 20172
JEE Physics · Easy

Electromagnetic Induction and Alternating Current: Faraday's Law MCQ

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Faraday's LawEasyQuestion 20172

Question

Faraday's law states that induced emf is:
  1. A
    Proportional to magnetic flux
  2. B
    Equal to rate of change of magnetic flux
  3. C
    Equal to −dΦ/dt
    Correct
  4. D
    Equal to dΦ/dt without a sign

Correct answer

Equal to −dΦ/dt

Explanation

EMF = −dΦ/dt. The negative sign is Lenz's law — the induced emf opposes the change in flux (energy conservation).

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