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?

Q: What topic does this question test?

This question tests D.C. circuits in A-Level Physics (syllabus code 9702). It is worth 1 mark.

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: The resistance of the filament increases with a rise in temperature.

📋 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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About This A-Level Physics Question

Topic

This multiple-choice question tests D.C. circuits in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2011 examination, Paper 1 Variant 2.

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