Q. The Young’s modulus of the material of a wire is equal to the
A) Stress required to increase its length four times
B) Stress required to produce unit strain
C) Strain produced in it
D) Half the strain produced in it
Explanation
(b) Young’s modulus of material $Y = \frac{Linear\ stress}{Longitudinal\ strain}$
If longitudinal strain is equal unity, then
$Y =$ Linear stress produced
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.