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The flux associated with a coil changes from 1 . 35 Wb to 0 . 79 Wb within 1 10 s . Then the charge which flows in the coil, if resistance of coil is 7 Ω is

Options

  1. A0.08 C
  2. B0.8 C
  3. C0.008 C
  4. D8 C

Correct answer

A. 0.08 C

Step-by-step solution

As, I = E R = d ϕ R d t ⇒ I d t = d ϕ R Integrating, ∫ I d t = ∫ d ϕ R ⇒ q = ϕ R If coil contains N turns, then q = N ϕ R . If there is flux change Δ ϕ , then q = N Δ ϕ R . ⇒ q = 1 7 × 1.35 - 0.79 = 0.08 C

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