O-LevelPhysicsThermal Physics5054/11 · Oct/Nov 2014 · Q121 Mark

Air is trapped in a cylinder by a piston. The pressure of the air is p and the length of the air column is 20 cm. The piston is moved outwards until the length of the air column has increased by 40 cm. The temperature of the air remains constant. What is the new air pressure?

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Ap/2

Bp/3

C2p

D3p

✓ Correct answer

B: p/3

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2014 Paper 1 Variant 1, question 12.

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