A-LevelPhysicsD.C. circuitsMay/June 2015Paper 1 Q371 Mark
A cell of e.m.f. 2.0 V and negligible internal resistance is connected to a network of resistors as shown. [Figure showing a 2.0V cell connected to a series 2.0Ω resistor, followed by two parallel branches. The top branch has a 2.0Ω and a 4.0Ω resistor in series. The bottom branch has a 4.0Ω and a 2.0Ω resistor in series. Current I is specified in the 4.0Ω resistor of the bottom branch.] What is the current I?
A0.25 A
B0.33 A
C0.50 A
D1.5 A
✓ Correct Answer
The correct answer is A: 0.25 A
📋 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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