A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2021 · Q381 Mark

A battery of electromotive force (e.m.f.) 9.0 V and internal resistance 1.0 Ω is connected to a fixed resistor of resistance 5.0 Ω and a potentiometer of maximum resistance 3.0 Ω, as shown. [Figure 38.1] The sliding contact of the potentiometer is moved over its full range of movement. What is the maximum value of the potential difference that is measured by the voltmeter?

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A3.0 V

B3.4 V

C4.5 V

D5.4 V

✓ Correct answer

A: 3.0 V

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2021 Paper 1 Variant 2, question 38.

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