Question

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

• A. $0.2$
• B. $0.4$
• C. $1.2$
• D. $2.4$

Answer 1

Answer: (A)

$0.2$

$Y=2\eta \left(1+\sigma \right)$

But $Y=2.4\eta$

$\therefore 2.4\eta =2\eta \left(1+\sigma \right)$

$\left(1+\sigma \right)=1.2$

$\sigma =0.2$

Hence,

option $\left(A\right)$ is correct answer.