A weight of
100 N is suspended by two wires made of steel and copper as shown in the figure. Length of steel wire is
1 m and copper wire is
√3 m. Find the ratio of change in length of copper wire
(Δlc) to change in length of steel wire
(Δls). Given Young's modulus:
Ysteel=2×1011 N/m2,
Ycopper=1×1011 N/m2