O-LevelPhysicsThermal PhysicsOct/Nov 2024Paper 1 Q131 Mark
Air at a pressure of 1.0 × 10⁵ N/m² is trapped in a container by a piston. [Figure] A force is applied to move the piston down into the container. The temperature of the air remains constant. The distance between the base of the container and the piston decreases from 0.18 m to 0.15 m. What is the new air pressure inside the container?
A0.69 × 10⁵ N/m²
B0.83 × 10⁵ N/m²
C1.2 × 10⁵ N/m²
D1.4 × 10⁵ N/m²
✓ Correct Answer
The correct answer is C: 1.2 × 10⁵ N/m²
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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