Question

For which material the Poison's ratio is more than unity?

• A. Steel
• B. Copper
• C. Aluminium
• D. none of these

Answer 1

Answer:

D. none of these

Poisson's ratio is the ratio of transverse strain to longitudinal strain. For perfectly isotropic elastic material, it is 0.25. For steels, it is 0.3. Among the given options, none have a Poisson's ratio greater than unity.