Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 19

A wire is fixed at one end and extended by a force that is applied to the other end. The force is slowly increased from zero and then slowly decreased back to zero. The force–extension graph for the wire is shown. The graph line for the wire being loaded is the same as the graph line for the wire being unloaded. Which statement describes the deformation of the wire?

1. AIt is both elastic and plastic.
2. BIt is elastic only.
3. CIt is neither elastic nor plastic.
4. DIt is plastic only.

As printed in the paper