A-LevelPhysicsDeformation of solidsOct/Nov 2022Paper 1 Q201 Mark

A known tensile force acts on a metal wire. The wire does not exceed its limit of proportionality. Which two measurements enable the strain of the wire to be calculated?

Q: What topic does this question test?

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

Athe unstretched length of the wire and the cross-sectional area of the wire

Bthe unstretched length of the wire and the extension of the wire

Cthe Young modulus of the metal and the extension of the wire

Dthe Young modulus of the metal and the unstretched length of the wire

✓ Correct Answer

The correct answer is B: the unstretched length of the wire and the extension of the wire

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

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2022 examination, Paper 1 Variant 2.

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