A-LevelPhysicsD.C. circuitsOct/Nov 2017Paper 1 Q371 Mark
The circuit shown contains a resistor S that is neither in series nor in parallel with the other resistors. [Figure showing a complex circuit diagram with a 12.0 V source, various resistors, and current values including 3.0 A, 4.0 A, 0.5 A, and 0.50 Ω] Kirchhoff's laws can be used with the data in the diagram to deduce the resistance of each of the two identical resistors labelled R. What is the resistance of each resistor R?
A3.0 Ω
B4.0 Ω
C4.8 Ω
D5.0 Ω
✓ Correct Answer
The correct answer is B: 4.0 Ω
📋 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.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep