A-LevelPhysicsD.C. circuitsOct/Nov 2021Paper 1 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?
A3.0 V
B3.4 V
C4.5 V
D5.4 V
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