Physics Elasticity Question 40
Question: If the Young’s modulus of the material is 3 times its modulus of rigidity, then its volume elasticity will be
Options:
A) Zero
B) Infinity
C) $ 2\times 10^{10},N/m^{2} $
D) $ 3\times 10^{10},N/m^{2} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ Y=2\eta (1+\sigma ) $
Therefore $ 3\eta =2\eta (1+\sigma ) $
Therefore $ \sigma =\frac{3}{2}-1=\frac{1}{2} $ Now substituting the value of s in the following expression. $ Y=3K(1-2\sigma ) $
Therefore $ K=\frac{Y}{3(1-2\sigma )}=\infty $
BETA
