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