A-LevelPhysicsD.C. circuitsOct/Nov 2009Paper 1 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?
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
The correct answer is C. This question tests the candidate's understanding of d.c. circuits within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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