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
A$OA$
B$OC$
C$OD$
D$OB$
AIEEE 2012, Medium
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A$OA$
a 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 .
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