A-LevelPhysicsD.C. circuitsOct/Nov 2021Paper 1 Q341 Mark

A battery of electromotive force (e.m.f.) 10 V and internal resistance 5.0 Ω is connected to a 5.0 Ω load resistor. [Figure 34.1] Which change occurs when the 5.0 Ω load resistor is replaced with a 50 Ω load resistor?

Q: What topic does this question test?

This question tests D.C. circuits in A-Level Physics (syllabus code 9702). It is worth 1 mark.

AThe current in the circuit increases.

BThe potential difference across the load resistor increases.

CThe power dissipated in the internal resistance of the battery increases.

DThe total power dissipated in the circuit increases.

✓ Correct Answer

The correct answer is B: The potential difference across the load resistor increases.

📋 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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About This A-Level Physics Question

Topic

This multiple-choice question tests D.C. circuits in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2021 examination, Paper 1 Variant 2.

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