Physics (AS & A Level) · May / June 2016 · Paper 13 · Question 21

A metal wire of cross-sectional area 0.20 mm² hangs vertically from a fixed point. A load of 84 N is then attached to the lower end of the wire. The wire obeys Hooke's law and increases in length by 0.30%. What is the Young modulus of the metal of the wire?

1. A1.4 × 10⁵ Pa
2. B1.4 × 10⁸ Pa
3. C1.4 × 10⁹ Pa
4. D1.4 × 10¹¹ Pa

As printed in the paper