A-LevelPhysicsD.C. circuits9702/12 · Oct/Nov 2009 · Q291 Mark

A cell is connected to a resistor. [Figure 29.1] At any given moment, the potential difference across the cell is less than its electromotive force. Which statement explains this?

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AThe cell is continually discharging.

BThe connecting wire has some resistance.

CEnergy is needed to drive charge through the cell.

DPower is used when there is a current in the resistor.

✓ Correct answer

C: Energy is needed to drive charge through the cell.

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2009 Paper 1 Variant 2, question 29.

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