Same chapter2 marksDifficulty: Easy
Name the three wires of a domestic supply and state the colour of each in the modern convention.
Household Circuits
2 marksDifficulty: Easy
Why is a fuse always connected in the live wire and never in the neutral wire?
Original Khojo Papers practice question — not from a past board paper.
Answer
A fuse in the live wire breaks the connection between the appliance and the live terminal of the supply when it blows, so the appliance is completely cut off from the high potential and is safe to touch. A fuse in the neutral wire would break the circuit but leave the appliance still connected to the live wire, so it would remain dangerous.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The switch is placed in the live wire for the same reason.
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