Physics (AS & A Level) · May / June 2024 · Paper 12 · Question 19

Two wires, P and Q, made of the same material, are stretched with an increasing force. A graph is plotted of the variation with force of the extension of each wire. [graph: extension/mm vs force/N, lines P and Q] The wires have the same original length but different diameters. What is the ratio (diameter of wire Q)/(diameter of wire P)?

1. A1/3
2. B1/√3
3. C√3
4. D3

As printed in the paper