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A-LevelPhysicsDeformation of solidsOct/Nov 2017Paper 2 Q45 Marks

A wire is designed to ensure that its strain does not exceed 4.0 × 10⁻⁴ when a force of 8.0kN is applied. The Young modulus of the metal of the wire is 2.1 × 10¹¹ Pa. It may be assumed that the wire obeys Hooke's law. For a force of 8.0 kN, calculate, for the wire,

Q: What topic does this question test?

This question tests Deformation of solids in A-Level Physics (syllabus code 9702). It is worth 5 marks.

📋 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 structured question tests Deformation of solids in A-Level Physics (syllabus code 9702). It is worth 5 marks.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2017 examination, Paper 2 Variant 1.

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