A-LevelPhysicsD.C. circuits9702/12 · May/June 2010 · 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?

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

D: thermistor: lowest temperature, LDR: lowest illumination

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2010 Paper 1 Variant 2, question 30.

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