Question

For a given material, the Young's modulus is 2.4 times that of rigidity modulus. Its Poisson's ratio is

• A. 2.4
• B. 1.2
• C. 0.4
• D. 0.2

Answer 1

The correct option is D

0.2

$\gamma =2\eta (1+\sigma )$
$2.4\eta =2\eta (1+\sigma )\Rightarrow 1.2=1+\sigma \Rightarrow \sigma =0.2$