Wave Mechanics Question 517
The Poisson’s ratio of a material is 0.5. If a force is applied to a wire of this material, there is a decrease in the cross-sectional area by 4%. The percentage increase in the length is: 0.8%
Options:
1%
2%
C) 2.5%
4%
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ \frac{\Delta r/r}{\Delta l/l}=0.5=\frac{1}{2},\frac{\Delta r}{r}=\frac{1}{2}\frac{\Delta l}{l} $
BETA
