Q. For a given material, the Young’s modulus is 2.4 times that of modulus of rigidity. Its Poisson’s ratio is
A) 0.1
B) 0.2
C) 0.3
D) 0.4
Explanation
(b) $\eta = \ \frac{Y}{2(1 + \sigma)}\ or\ \ \eta = \ \frac{2.4\ \eta}{2(1 + \sigma)}$
Or $1 + \ \sigma = 1.2\ or\ \ \sigma = 0.2$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.