O-LevelPhysicsThermal Physics5054/11 · May/June 2013 · Q151 Mark

Using an electric kettle, 200 g of water at 100 °C is converted into steam at 100 °C in 300 seconds. The specific latent heat of steam is 2250 J/g. What is the average electrical power used?

A2250 / (300 × 200) W

B(200 × 2250) / 300 W

C(300 × 2250) / 200 W

D200 × 300 × 2250 W

✓ Correct answer

B: (200 × 2250) / 300 W

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2013 Paper 1 Variant 1, question 15.

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