A-LevelPhysicsDeformation of solids9702/12 · Oct/Nov 2011 · Q211 Mark

The graph shows the relationship between stress and strain for three wires of the same linear dimensions but made from different materials. [Figure 21.1] Which statements are correct? 1 The extension of P is approximately twice that of Q for the same stress. 2 The ratio of the Young modulus for P to that of Q is approximately two. 3 For strain less than 0.1, R obeys Hooke's law.

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A1, 2 and 3

B1 and 3 only

C2 and 3 only

D2 only

✓ Correct answer

C: 2 and 3 only

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Topic: Deformation of solids, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2011 Paper 1 Variant 2, question 21.

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