Physics - Current Electricity Question with Solution | TestHub

A copper wire of length $2.2\mathrm{m}$ and a steel wire of length $1.6\mathrm{m}$, both of diameter $3.0\mathrm{mm}$ are connected end to end. When stretched by a force, the elonation in length $0.50\mathrm{mm}$ is produced in the copper wire. The stretching force is $\left({\mathrm{Y}}_{\mathrm{cu}}=1.1\times 10^{11}\mathrm{N}/{\mathrm{m}}^2,{\mathrm{Y}}_{\text{steel }}=2.0\times 10^{11}\mathrm{N}/{\mathrm{m}}^2\right)$