An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is____________?
Correct answer: D. 0.02 Wb
- A. 20 Wb
- B. 2 Wb
- C. 0.2 Wb
- D. 0.02 Wb
Explanation
Faraday’s law gives e = N(ΔΦ/Δt), so ΔΦ = eΔt/N = 10 × 0.5/250 = 0.02 Wb. The total flux change is therefore option d.
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