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Electromagnetic TheoryFaraday's Law

A coil of 100 turns experiences a uniform change in flux per turn from 5 mWb to 1 mWb in 0.02 s. The magnitude of average induced emf is?

  • A5 V
  • B10 V
  • C20 V
  • D40 V
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Correct Answer: C. 20 V
Explanation: |e|=N|ΔPhi|/Δt=100×4×10^-3/0.02=20 V.
Reference: Standard electromagnetic theory: faraday's law
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