Physics (AS & A Level) · May / June 2025 · Paper 13 · Question 23

A wire of length L is stretched to determine its limit of proportionality. The graph shows the variation of the extension x with the force F applied to the wire. The limit of proportionality is shown by point P on the graph. The experiment is repeated with another wire of length 2L but of the same material and same diameter as the first wire. Which point on the graph shows the limit of proportionality for the new wire?

1. AA
2. BB
3. CC
4. DD

As printed in the paper