A-LevelPhysicsD.C. circuitsMay/June 2010Paper 1 Q301 Mark

The resistance of a thermistor depends on its temperature, and the resistance of a light-dependent resistor (LDR) depends on the illumination. Under which conditions will the resistance of both a thermistor and an LDR be highest?

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.

Athermistor: highest temperature, LDR: highest illumination

Bthermistor: highest temperature, LDR: lowest illumination

Cthermistor: lowest temperature, LDR: highest illumination

Dthermistor: lowest temperature, LDR: lowest illumination

✓ Correct Answer

The correct answer is D: thermistor: lowest temperature, LDR: lowest illumination

📋 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 May/June 2010 examination, Paper 1 Variant 2.

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