According to Hooke's law, within the elastic limit stress/strain `=` constant. This constant depends on the type of strain or the type of force acting. Tensile stress might result in compressional or elongative strain, however, a tangential stress can only cause a shearing strain. After crossing the elastic limit, the material undergoes elongation and beyond a stage beaks. All modulus of elasticity are basically constants for the materials under stress.
If stress/strain is `x` in elastic region and `y` in the region of yield, then

Options

A. `x=y`
B. `xgty`
C. `xlty`
D. `x=2y`

Answer

B

Explanation

Stress -strain curve flatterns on crossing the elastic limiting region So, b is correct.