A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2018 · Q321 Mark

The diagram shows a simple circuit. [Figure 32.1] Which statement is correct?

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AWhen switch S is closed, the e.m.f. of the battery falls because work is done against the internal resistance of the battery.

BWhen switch S is closed, the e.m.f. of the battery falls because work is done against the resistance of R.

CWhen switch S is closed, the potential difference across the battery falls because work is done against the internal resistance of the battery.

DWhen switch S is closed, the potential difference across the battery falls because work is done against the resistance of R.

✓ Correct answer

C: When switch S is closed, the potential difference across the battery falls because work is done against the internal resistance of the battery.

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2018 Paper 1 Variant 2, question 32.

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