The r.m.s. potential difference between the red live wire and black ne

The r.m.s. potential difference between the red live wire and black neutral wire in Indian domestic electric supply is

160 V

220 V

300 V

410 V

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This question was previously asked in

UPSC CDS-1 – 2023

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The standard r.m.s. (root mean square) voltage for domestic electric supply in India is 220 volts. This is the effective voltage that determines the power delivered to electrical appliances. The peak voltage is higher, approximately $220 \times \sqrt{2} \approx 311$ volts.

– The voltage of AC power is usually specified by its r.m.s. value.
– The standard domestic supply voltage in India is 220-240 V AC at 50 Hz.

Different countries use different standard voltages and frequencies for domestic power supply (e.g., 120 V at 60 Hz in North America, 230 V at 50 Hz in much of Europe). The red wire is typically the live or phase wire, and the black wire is the neutral wire. The potential difference exists between the live and neutral wires.

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