Question

A copper wire and a steel wire of the same diameter and length are joined end to end and a force is applied which stretches their combined length by $1 \,cm$. Then the two wires will have:

• A. the same stress and strain
• B. the same stress but different strains
• C. the same strain but different stresses
• D. different stresses and strains

Answer 1

Answer: (B)

the same stress but different strains

Answer 2

As same force is applied to each wire having equal area of cross-section, so stress is same but extensions will be different for wires of different materials. So, same stress but different strains are there.