Physicshard · Past Paper
What is the peak voltage of a 220V AC supply? (Hint: V_peak = V_rms * √2)
A220 V
B110 V
C311 V
D440 V
✓ Correct Answer: C — 311 V
220V is the RMS value. V_peak = 220 * 1.414 ≈ 311V.
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