Question

Materials get deformed when force is applied. Some of them regain their status when the applied force is removed. They are termed as elastic. Those of which not regaining are called plastic. There may be delay in the regaining in some materials. They are said to have got elastic aftereffect, since they have gone beyond the elastic limit. Repeated application and removal of force break at any point time and so are avoided.
The stress strain graph for two materials $A$ and $B$ is shown in the following figure:
If the intensity of $A$ and $B$ is $E_A$ and $E_B$, respectively, then

• A. $E_A=E_B$
• B. $E_A>E_B$
• C. $E_A<E_B$
• D. $E_A<<E_B$

Answer 1

The correct option is B $E_A>E_B$

Within the limit of elasticity,
$Coefficientofelasticity=\frac{Stress}{Strain}=slopeofcurve$
And the slope is greater for material A. so $E_A$ will be greater than $E_B$