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O-LevelPhysicsElectricity5054/11 · May/June 2022 · Q351 Mark

A metal kettle is plugged into a mains socket. The plug contains a suitable fuse. The kettle's cable is damaged and the fuse blows. Why does the fuse blow?

AThe bare earth wire in the cable touches the bare live wire.
BThe metal casing of the kettle touches the bare earth wire.
CThe bare neutral wire in the cable touches the bare earth wire.
DThe live wire breaks without touching any other wire.

✓ Correct answer

A: The bare earth wire in the cable touches the bare live wire.

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About this question

Topic
Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, May/June 2022 Paper 1 Variant 1, question 35.

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