Physics (AS & A Level) · Oct / Nov 2025 · Paper 13 · Question 21

A wire has an unstretched length of 2.00 m. A stress of 1.6 × 10^5 Pa is applied to the wire, and the new length of the wire is 2.10 m. The wire obeys Hooke's law. What is the Young modulus of the wire?

1. A8.0 × 10^3 Pa
2. B7.8 × 10^4 Pa
3. C1.5 × 10^5 Pa
4. D3.2 × 10^6 Pa

As printed in the paper