A 3 cm long copper wire is stretched to increase its length by 0.3 cm. find the lateral strain in the wire, if the Poisson.s ratio for copper is 0.26.

Explanation

`L=3cm, DeltaL=0.3cm, sigma=0.26`.
Longitudinal strain `(DeltaL)/(L)=(0.3)/(3)=0.1`
`sigma=("Lateral Strain")/("Longitudinal Strain")`
The lateral Strain `=sigma xx `Longitudinal Strain
`=0.26xx0.1 =0.026. `