O-LevelPhysicsForcesOct/Nov 2024Paper 2 Q49 Marks
Fig. 4.1 shows a large syringe that is sealed at the nozzle by wax. There is a piston inside the syringe. [Figure 4.1] The pressure of the air inside the syringe is equal to atmospheric pressure, 1.0 × 10⁵ Pa. The volume of the air inside the syringe is 1.2 × 10⁻⁴ m³. The area of the end of the piston that is in contact with the air is 3.5 × 10⁻³ m². The friction between the piston and the syringe is negligible.
📋 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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