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Among rubber and steel which is more elastic

$\begin{array}{1 1}(A)\;\text{Rubber}\\(B)\;\text{Steel}\\(C)\;\text{Equally elastic}\\(D)\;\text{Can't be said}\end{array} $

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If we consider 2 rods of rubber and steel of equal length and area and apply equal forces on them then
$\Delta l_{rubber} > \Delta l_{steel}$
$Y \propto \large\frac{1}{\Delta l}$
So $Y_{steel} > Y_{rubber}$
$\Rightarrow$ Steel is more elastic.
Hence (B) is the correct answer.
answered May 7, 2014 by sreemathi.v

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