A-LevelPhysicsD.C. circuitsOct/Nov 2018Paper 2 Q69 Marks
(a) Define the volt. (b) A battery of electromotive force (e.m.f.) 7.0V and negligible internal resistance is connected in series with three components, as shown in Fig. 6.1. [Figure 6.1] Resistor X has a resistance of 5.2Ω. The resistance of the filament wire of lamp Y is 6.0Ω. The potential difference across resistor Z is 1.4V.
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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