A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2016 · Q211 Mark

Which force-extension graph shows plastic deformation of a sample of material?

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A[Diagram option A: Force-extension graph showing linear elastic deformation and unloading]

B[Diagram option B: Force-extension graph showing elastic deformation beyond linear region, then unloading along the same path]

C[Diagram option C: Force-extension graph showing plastic deformation with a different unloading path]

D[Diagram option D: Force-extension graph showing plastic deformation with elastic unloading, resulting in permanent extension]

✓ Correct answer

D: [Diagram option D: Force-extension graph showing plastic deformation with elastic unloading, resulting in permanent extension]

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Topic: Deformation of solids, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 21.

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