Physics (AS & A Level) · May / June 2023 · Paper 11 · Question 33

A metal wire has a length of 2.50 m and a cross-sectional area of 4.50 × 10⁻⁶ m². The resistivity of the metal is 3.50 × 10⁻⁷ Ω m. The wire is stretched so that its length increases to 2.65 m. The wire remains cylindrical and the volume of the wire remains constant. What is the change in the resistance of the wire?

1. A0.012 Ω
2. B0.024 Ω
3. C0.19 Ω
4. D0.22 Ω

As printed in the paper