A-LevelPhysicsD.C. circuitsOct/Nov 2014Paper 1 Q361 Mark
In the potentiometer circuit shown, the reading on the ammeter is zero. [Figure 36.1] The light-dependent resistor (LDR) is then covered up and the ammeter gives a non-zero reading. Which change could return the ammeter reading to zero?
ADecrease the supply voltage.
BIncrease the supply voltage.
CMove the sliding contact to the left.
DMove the sliding contact to the right.
✓ Correct Answer
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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