The load versus elongation graph for four wire of the same material is shown in the figure. The thickest wire is represented by the line

Options

A. OD
B. OC
C. OB
D. OA

Answer

a

Explanation

`I = (FL)/(AY) :. I prop (1)/(r^(2))` (where, Y, L and F are constants)
ie., for the same load, thickest wire will show minimum elongitation. So, graph D represent the thickest wire.