Question

A copper wire of length 1.0 m and a steel wire of length 0.5 m having equal cross-sectional areas are joined end to end. The composite wire is stretched by a certain load which stretches the copper wire by 1 mm. If the Young’s modulii of copper and steel are respectively 1.0xx10^(11)Nm^(-2)"and"2.0xx10^(11)Nm^(-2), the total extension of the composite wire is:

Answer 1

Answer:

Hey Buddy here's ur answer

Answer 2

Answer:

1.25 mm

Explanation:

Yc×(ΔLc/Lc)=Ys×(ΔLs/Ls)

⇒1×1011×(1×10−31)=2×1011×(ΔL50.5)

∴ΔLs=0.5×10−32=0.25mm

Therefore, total extension of the composite

wire =ΔLc+ΔLs

=1mm+0.25m=1.25m