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The domestic mains supply in India is approximately:
A220 V AC at 50 Hz frequency
B110 V DC at zero frequency
C440 V AC at 60 Hz frequency
D12 V DC for all home wiring
Answer & Solution
Correct answer: A. 220 V AC at 50 Hz frequency
India's domestic supply is 220 V AC at 50 Hz frequency. Three colour-coded wires are used: live (red/brown), neutral (black/blue), earth (green/yellow).
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