Q. If the Young’s modulus of the material is 3 times its modulus of rigidity, then its volume elasticity will be
A) Zero
B) Infinity
C) $2\ \times 10^{10}Nm^{- 2}$
D) $3\ \times 10^{10}Nm^{- 2}$
Explanation
(b) $\frac{3}{\eta} + \frac{1}{K} = \frac{9}{Y}$
$\frac{1}{K} = \frac{9}{Y} = \frac{3}{\eta}\ \ \ or\frac{1}{K} = \frac{9}{3\eta} - \frac{3}{\eta} = 0\ \Rightarrow K = \ \infty\ $
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.