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  4. The load versus elongation graph for four wires of the same material shown in graph. The thickest wire is represented by the wire <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/b2d6603bb900dd9b8c4c473dfcf700da-.png />

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Q. The load versus elongation graph for four wires of the same material shown in graph. The thickest wire is represented by the wire
image

Mechanical Properties of Solids

Solution:

$Y=\frac{F \times L}{A \times \Delta L}$
$\Rightarrow \Delta L=\frac{F L}{A Y}$
$\therefore \Delta L \propto \frac{1}{r^{2}}$
image