O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2015 · Q131 Mark

A gas is trapped inside a cylinder by a movable piston. The length of the gas column is 20 cm and the pressure inside the cylinder is p. The piston is pulled out a distance of 30 cm, so that the length of the gas column is now 50 cm. The temperature of the gas does not change. What is the new pressure of the gas?

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A0.40 p

B0.60 p

C1.5 p

D2.5 p

✓ Correct answer

A: 0.40 p

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2015 Paper 1 Variant 1, question 13.

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