alleryThe household line voltage of 220 V is quoted as which kind of value?
AAn raw value
BAn odd value
CAn old value
DAn rms value
Answer & Solution
Correct answer: D. An rms value
1. Mains voltage is not the peak the waveform actually reaches.
2. The quoted figure is the heating-equivalent value.
3. The household line voltage of 220 V is an rms value.
4. The peak voltage is about 311 V.
_Source: syllabus Physics Part I, Ch 7 'Alternating Current'_
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