A-LevelPhysicsD.C. circuitsFeb/Mar 2017Paper 5 Q215 Marks
A student is investigating the potential difference in a circuit. The circuit is set up as shown in Fig. 2.1. E P Q V [Figure 2.1] Two resistors P and Q are connected in series to a power supply of electromotive force (e.m.f.) E and negligible internal resistance. Resistor P has resistance P. The potential difference V across resistor P is measured. The experiment is repeated for different values of P. It is suggested that V and P are related by the equation V=(P/(P+Q))E where Q is the resistance of resistor Q. The value of Q is kept constant.
✓ Correct Answer
The correct answer is —. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep