O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2010 · Q201 Mark

What is caused by the thermal expansion of a substance when heated?

Adecrease in the resistance of a tungsten-filament lamp when switched on

Brise in the pressure of the gas trapped in a gas cylinder placed in hot water

Cthe blowing of the fuse in a circuit when the current becomes too large

Dthe upward movement of the air above a Bunsen burner when it is lit

✓ Correct answer

D: the upward movement of the air above a Bunsen burner when it is lit

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2010 Paper 1 Variant 1, question 20.

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