Physics (AS & A Level) · May / June 2025 · Paper 12 · Question 21

A student has a copper wire and a steel wire with equal lengths and cross-sectional areas. The student hangs identical loads on the two wires. The extensions of the two wires are different. The student calculates the stress, strain and Young modulus of each wire. Which row identifies with a tick (✓) the calculated values that are equal for both wires?

1. Astress ✓
2. Bstrain ✓
3. Cstrain ✓, Young modulus ✓
4. Dstress ✓, Young modulus ✓

As printed in the paper