Physics Elasticity Question 131
Question: A fixed volume of iron is drawn into a wire of length L. The extension x produced in this wire by a constant force F is proportional to
[MP PMT 1999]
Options:
A) $ \frac{1}{L^{2}} $
B) $ \frac{1}{L} $
C) $ L^{2} $
D)L
Show Answer
Answer:
Correct Answer: C
Solution:
$ l=\frac{FL}{AY}=\frac{FL^{2}}{(AL)Y}=\frac{FL^{2}}{VY} $ . If volume is fixed then $ l\propto \frac{1}{L} $
BETA
