What is the approximate peak voltage of a 220 V household supply?
A311 volts
B211 volts
C411 volts
D511 volts
Answer & Solution
Correct answer: A. 311 volts
1. The peak is the rms value multiplied by root two.
2. Root two is about 1.414.
3. That gives 1.414 times 220 volts.
4. The peak voltage is about 311 V.
_Source: NCERT Class XII Physics Part I, Ch 7 'Alternating Current'_
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