A-LevelPhysicsD.C. circuits9702/12 · May/June 2014 · Q301 Mark

A battery of electromotive force (e.m.f.) V and negligible internal resistance is connected to a 1 kΩ resistor, as shown. [Figure 30.1] A student attempts to measure the potential difference (p.d.) between points P and Q using two voltmeters, one at a time. The first voltmeter has a resistance of 1 kΩ and the second voltmeter has a resistance of 1 MΩ. What are the readings of the voltmeters?

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AV/2 V/2

BV/2 V

CV V/2

DV V

✓ Correct answer

B: V/2 V

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2014 Paper 1 Variant 2, question 30.

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