Question

For a given material, the Yong’s modulus is 2.4 times that of the modulus of rigidity. 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

: As $Y' = 2\eta(1 + \sigma)$

Where the symbols have their usual meanings

Given: $Y = 2.4\eta$

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

$1.2 = 1 + \sigma or\sigma = 1.2 - 1 = 0.2$