O-LevelPhysicsThermal PhysicsOct/Nov 2025Paper 3 Q210 Marks
In this experiment, you will investigate the absorption of thermal radiation by different coloured surfaces. You are provided with: • a lamp connected to a power supply • a thermometer with a piece of white card attached to its bulb • a thermometer with a piece of black card attached to its bulb • a clamp, boss and stand • a stopwatch • a 30 cm ruler. The supervisor has arranged the thermometer which has a piece of white card attached to its bulb so that the bulb is level with the filament of a lamp. The lamp is switched off. [Figure 2.1]
📋 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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