A) OD
B) OC
C) OB
D) OA
Correct Answer: A
Solution :
\[l=\frac{FL}{AY}\]\ \[l\propto \frac{1}{{{r}^{2}}}\] (Y, L and F are constant) i.e. for the same load, thickest wire will show minimum elongation. So graph D represent the thickest wire.
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