Physics (AS & A Level) · Oct / Nov 2024 · Paper 12 · Question 20

The graph shows the relationship between stress and strain for three wires of the same linear dimensions but made from different materials. 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.

1. A1, 2 and 3
2. B1 and 3 only
3. C2 and 3 only
4. D2 only

As printed in the paper