A) 0.1
B) 0.7
C) 0.2
D) 0.5
Correct Answer: B
Solution :
When a sample of material is stretched in one direction, it tends to get thinner in the other two directions. Poisson's ratio is a measure of this tendency. It is defined as the ratio of the contraction strain normal to the applied load divided by the extension strain in the direction of the applied load. For a perfectly incompressible material, Poisson's ratio would be 0.5. A poisson's ratio greater than 0.5 does not make sense because at a certain strain the material would reach zero volume and any further strain would give the material negative volume.
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