Same chapter1 markDifficulty: Medium
The colour of the earth wire in the modern convention is:
Household Circuits
3 marksDifficulty: Medium
State two advantages of a miniature circuit breaker over a fuse.
Original Khojo Papers practice question — not from a past board paper.
Answer
A miniature circuit breaker acts faster and more reliably than a fuse, and once the fault is cleared it can simply be switched back on instead of being replaced. It also trips at a definite current, so its protection is more precise.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A blown fuse must be replaced by a fresh wire of the correct rating, which takes time and invites the use of the wrong wire.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is the function of the earth wire and how does it protect the user?
Household Circuits
Same chapter3 marksDifficulty: Medium
A house has five 60 W lamps and one 1000 W heater, all working together on a 220 V supply. Calculate the total current drawn and state a suitable fuse rating.
Household Circuits
Same chapter3 marksDifficulty: Medium
Why is a three-pin plug preferred to a two-pin plug for a metal-bodied appliance?
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Same chapter2 marksDifficulty: Easy
Why is a fuse always connected in the live wire and never in the neutral wire?
Household Circuits
Same chapter2 marksDifficulty: Easy
Name the three wires of a domestic supply and state the colour of each in the modern convention.
Household Circuits