In materials like aluminium and copper, the correct order of magnitude of various elastic modulii is
JEE MAIN 2014, Medium
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Poisson's ratio,
$\sigma = \frac{{Iateral\,strain\left( \beta \right)}}{{longitudinal\,strain\left( \alpha \right)}}$
For material like copper, $\sigma = 0.33$
$And,\,y = 3k\left( {1 - 2\sigma } \right)$
$Also,\frac{9}{y} = \frac{1}{k} + \frac{3}{n}$
$y = 2n\left( {1 + \sigma } \right)$
$Hence,n < y < k$
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