A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2021 · Q341 Mark

A battery of electromotive force (e.m.f.) 10 V and internal resistance 5.0 Ω is connected to a 5.0 Ω load resistor. [Figure 34.1] Which change occurs when the 5.0 Ω load resistor is replaced with a 50 Ω load resistor?

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AThe current in the circuit increases.

BThe potential difference across the load resistor increases.

CThe power dissipated in the internal resistance of the battery increases.

DThe total power dissipated in the circuit increases.

✓ Correct answer

B: The potential difference across the load resistor increases.

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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 34.

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