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  4. The load versus elongation graphs for four wires of same length and made of the same material are shown in the figure. The thinnest wire is represented by the line

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Q. The load versus elongation graphs for four wires of same length and made of the same material are shown in the figure. The thinnest wire is represented by the linePhysics Question Image

AIEEEAIEEE 2012Mechanical Properties of Solids

Solution:

From the graph, it is clear that for the same value of load, elongation is maximum for wire $OA$. Hence $OA$ is the thinnest wire among the four wires.