Physics - Elasticity Question with Solution | TestHub

Poisson's ratio ($\nu$) is defined as the negative ratio of lateral strain to longitudinal strain.$\nu =-\frac{\text{Lateral strain}}{\text{Longitudinal strain}}$ Given $\nu =0.25$ and longitudinal strain $=4\times 10^{-3}$.

Lateral strain $=-\nu \times \text{Longitudinal strain}=-0.25\times (4\times 10^{-3})=-1\times 10^{-3}=-10\times 10^{-4}$.

The magnitude of the lateral strain is $10\times 10^{-4}$.

So the answer is 10.