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

Answer: (D)

0.2

Answer 2

$Y = 2\eta(1 + \sigma)$ ⇒ $2.4\eta = 2\eta(1 + \sigma)$ ⇒ $1.2 = 1 + \sigma$ ⇒ $\sigma = 0.2$