Physics Elasticity Question 102
Question:Two wires of copper having the length in the ratio 4 : 1 and their radii ratio as 1 : 4 are stretched by the same force. The ratio of longitudinal strain in the two will be
Options:
A) 1 : 16
B) 16 : 1
C) 1 : 64
D) 64 : 1
Show Answer
Answer:
Correct Answer: B
Solution:
$ \epsilon \propto \frac{\Delta r}{r} $ Ratio of strain =$ \frac{A _{2}}{A _{1}}={{\left( \frac{r _{2}}{r _{1}} \right)}^{2}}={{\left( \frac{4}{1} \right)}^{2}}=\frac{16}{1} $
BETA
