# From among the given options, Poisson’s ratio is the highest for:

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From among the given options, Poisson’s ratio is the highest for:
1. wood
2. rubber
3. iron
4. copper

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Correct Answer - Option 2 : rubber

Explanation:

Poisson's ratio:

Poisson's ratio is the ratio of lateral strain to longitudinal strain. Mathematically is given by,

$μ = -\frac{Lateral\ strain}{Longitudinal \ Strain}$

A negative sign in the formula is to make the ratio positive.

 Material Poisson's Ratio (μ) Gold 0.44 Magnesium 0.35 Copper 0.33 Rubber 0.4999 Steel 0.30 Concrete 0.20 iron 0.21-0.29 Wood 0.18-0.43

The Poisson ratio is the property of the material.