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  4. The load versus elongation graph for four wires of the same materials shown in the figure. The thinnest wire is represented by the line

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Q. The load versus elongation graph for four wires of the same materials shown in the figure. The thinnest wire is represented by the linePhysics Question Image

MHT CETMHT CET 2011

Solution:

image
It is clear from the graph that, for same value of load $(F),$ elongations $l_1, l_{2}, l_{3}, l_{4}$ are such that
$l_{4}>l_{3}>l_{2}>l_1$
So, $OA$ represents the thinnest wire.