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The Young’s modulus of elasticity of a material is 2.5 times its modulus...

Q.  
The Young’s modulus of elasticity of a material is 2.5 times its modulus of rigidity. The Poisson’s ratio for the material will be


Answer & Explanation

Young’s modulus of elasticity of a material is 2.5 times its modulus of rigidity i.e. E=2.5G
We have relation,
G= E/2(1 + μ)
put E=2.5G,
G= (2.5G)/2(1 + μ)
After solving we get,
μ =0.25 (ans)

Thus correct option is: A.

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