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

Stress = ForceareaIn the present case, force applied and area of cross section of wires are same, therefore stress has to be the same. Strain = StressYSince the Young's modulus of steel wire is greater than the copper wire, therefore, strain in case of steel wire is less than that in case of copper wire.