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

Solution

## The correct option is D $$0.2$$$$Y=2\eta(1+\sigma)$$$$\Rightarrow 2.4\eta =2\eta(1+\sigma)$$$$\Rightarrow 1.2=1+\sigma$$$$\Rightarrow \sigma=0.2$$Physics

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