Two separate wires X and Y have the same original length and cross-sectional area. The graph shows the extension ΔL produced in X and Y when the tensile force F applied to the wires is increased up to the point where they break.
Which statement is incorrect?
1 )
For a given extension more energy is stored in X than in Y.
The Young modulus of the material of wire Y is greater than that of wire X.
3 )
Both wire X and wire Y obey Hooke’s law.
4 )
Wire X has a greater breaking stress than wire Y.
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