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Question 20221
JEE Physics · Medium

Electromagnetic Induction and Alternating Current: EMF — Rotating Coil MCQ

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EMF — Rotating CoilMediumQuestion 20221

Question

A 200-turn coil of area 50 cm² rotates at 50 Hz in field B = 0.4 T. Peak EMF is:
  1. A
    40π V
    Correct
  2. B
    4π V
  3. C
    400π V
  4. D
    2π V

Correct answer

40π V

Explanation

E₀ = NBAω = 200 × 0.4 × 50×10⁻⁴ × 2π×50 = 200 × 0.4 × 0.005 × 100π = 200 × 0.4 × 0.5π = 40π V.

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