Q. The strain-stress curves of three wires of different materials are shown in the figure. $P,Q$ and $R$ are the elastic limits of the wires. The figure shows that
A) Elasticity of wire $P$ is maximum
B) Elasticity of wire $Q$ is maximum
C) Tensile strength of $R$ is maximum
D) None of the above is true
Explanation
(d) As stress is shown on $x$-axis and strain on $y$-axis
So we can say that $Y = \cot{\theta = \frac{1}{\tan\theta} = \frac{1}{slope}}$
So elasticity of wire $P$ is minimum and of wire $R$ is maximum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.