alleryFor an AC generator with EMF ε(t) = ε₀ sin(ωt), the RMS EMF:
Aε₀ / sqrt(2)
Bε₀ × 2
Cε₀
Dε₀ / 2
Answer & Solution
Correct answer: A. ε₀ / sqrt(2)
ε_rms = ε₀/sqrt(2) for sinusoidal.
Defined so that I_rms × R gives correct average power: P_avg = V_rms × I_rms × cos φ.
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