A-LevelPhysicsD.C. circuitsMay/June 2013Paper 1 Q381 Mark
In the circuit below, the reading Vₜ on the voltmeter changes from high to low as the temperature of the thermistor changes. The reading Vₗ on the voltmeter changes from high to low as the level of light on the light-dependent resistor (LDR) changes. [Figure showing a circuit with a thermistor, LDR, and two voltmeters Vₜ and Vₗ] The readings Vₜ and Vₗ are both high. What are the conditions of temperature and light level?
Alow
low
Blow
high
Chigh
low
Dhigh
high
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The correct answer is C. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
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