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For a given material the Young's modulus is 2.4 times that of rigidity modulus. What is its poisson's ratio?

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For a given material the Young's modulus is 2.4 times that of rigidity modulus. What is its poisson's ratio? 

(A) 2.4 

(B) 1.2 

(C) 0.4 

(D) 0.2

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1 Answer

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Correct option: (D) 0.2

Explanation:

Given : Y = 2.4η

As Y = 2η(1 + σ)

Hence 2.4η = 2η(1 + σ)

∴ (1.2 – 1) = σ

σ = 0.2   

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