A-LevelPhysicsD.C. circuitsOct/Nov 2011Paper 1 Q331 Mark
The graph shows the variation with potential difference (p.d.) of the current in a lamp filament. [Figure 33.1] Which statement explains the shape of this graph?
AAs the filament temperature rises, electrons can pass more easily through the filament.
BIt takes time for the filament to reach its working temperature.
CThe power output of the filament is proportional to the square of the current in it.
DThe resistance of the filament increases with a rise in temperature.
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
📋 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...
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