O-LevelPhysicsElectricity5054/11 · May/June 2020 · Q401 Mark

A kettle is connected to the 240 V mains supply using a plug containing a 13 A fuse. The kettle contains water. When it is switched on, the fuse blows. This happens again after a new fuse is fitted. Someone replaces the fuse with a nail, and the kettle works. What else might happen as a result of replacing the fuse with a nail?

Avery large current overloads the wiring, causing a fire.

BThe kettle boils the water less quickly.

CThe kettle uses more energy to boil the water.

DThe water boils at a higher temperature.

✓ Correct answer

A: very large current overloads the wiring, causing a fire.

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2020 Paper 1 Variant 1, question 40.

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