A-LevelPhysicsD.C. circuitsMay/June 2023Paper 1 Q371 Mark
In the potentiometer circuit shown, the reading on the ammeter is zero. [Figure 37.1] The light-dependent resistor (LDR) is then covered and the ammeter gives a non-zero reading. Which change could return the ammeter reading to zero?
Adecreasing the supply voltage
Bincreasing the supply voltage
Cmoving the sliding contact to the left
Dmoving the sliding contact to the right
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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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