A-LevelPhysicsDeformation of solidsFeb/Mar 2019Paper 1 Q191 Mark

A metal wire, fixed at one end, has length l and cross-sectional area A. The wire extends a distance e when mass m is hung from the other end of the wire. What is an expression for the Young Modulus E of the metal?

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

The correct answer is B: mgl / Ae.

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.

Aml / Ae

Bmgl / Ae

Cme / Al

Dmge / Al

✓ Correct Answer

The correct answer is B: mgl / Ae

📋 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 Feb/Mar 2019 examination, Paper 1 Variant 2.

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