O-LevelPhysicsThermal Physics5054/12 · May/June 2022 · Q231 Mark

A hairdryer is used to blow air across the surface of water in a beaker so that the water evaporates. What increases the rate of evaporation of the water?

Adecreasing the speed of the air from the hairdryer

Bdecreasing the mass of the water in the beaker

Cincreasing the surface area of the water by using a wider beaker

Dincreasing the volume of the water in the beaker

✓ Correct answer

C: increasing the surface area of the water by using a wider beaker

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2022 Paper 1 Variant 2, question 23.

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