Question

A copper wire and a steel wire of the same diameter and length are connected ends to end and a force is applied so that their combined length stretched by $1cm$. The two wires have

• A. same stress, same strain
• B. same stress, different strains
• C. same strain different stress
• D. different stress, different strains

Answer 1

Answer: (B)

same stress, different strains

Since the wires are connected end to end the net stress both will expect individually will be same but since both have diff $Y$ they will experience diff strains. (Area of cross section and length are same only to make the comparison easier using the expression $Y=$Fl /Ae)