A-LevelPhysicsElectricityFeb/Mar 2018Paper 1 Q341 Mark

A wire of resistance 9.55 Ω has a diameter of 0.280 mm. It is made of metal of resistivity 4.90 × 10⁻⁷ Ω m. What is the length of the wire?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is A: 1.20 m.

Q: What topic does this question test?

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

A1.20 m

B4.80 m

C19.0 m

D76.8 m

✓ Correct Answer

The correct answer is A: 1.20 m

📋 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 Electricity in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Feb/Mar 2018 examination, Paper 1 Variant 2.

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