Physics (AS & A Level) · Oct / Nov 2021 · Paper 12 · Question 38
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. 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?
- A3.0 V
- B3.4 V
- C4.5 V
- D5.4 V
As printed in the paper
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Correct answer: A. 3.0 V
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