Q. Which one of the following is the Young’s modules (in $N/m^{2})$ for the wire having the stress-strain curve shown in the figure
A) $24 \times 10^{11}$
B) $8.0 \times 10^{11}$
C) $10 \times 10^{11}$
D) $2.0 \times 10^{11}$
Explanation
(d) Young’s modulus is defined only in elastic region and
$Y = \frac{Stress}{Strain} = \frac{8 \times 10^{7}}{4 \times 10^{- 4}} = 2 \times 10^{11}N/m^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.