Question

A $3cm$ long copper wire is stretched to increase its length by $0.3cm.$ If poisson's ratio for copper is $0.26$, the lateral strain in the wire is

• A. 0.26
• B. 2.6
• C. 0.026
• D. 0.0026

Answer 1

Answer: (C)

0.026

$ϵx=\frac{0.3}{3}$$=0.1$ (standard result)

$\sigma =0.26$ (given)

$0.26=\frac{-ϵy}{0.1}$

$-0.026=ϵy$