A-LevelPhysicsD.C. circuits9702/12 · May/June 2020 · Q381 Mark
In the circuit shown, X is a variable resistor whose resistance can be changed from 5.0 Ω to 500 Ω. The electromotive force (e.m.f.) of the battery is 12.0 V. It has negligible internal resistance. [Figure 38.1] What is the maximum range of values of potential difference across the output?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A1.3 V to 11.1 V
B1.3 V to 12.0 V
C1.5 V to 11.1 V
D1.5 V to 12.0 V
✓ Correct answer
A: 1.3 V to 11.1 V
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