Physics Elasticity Question 100
Question: A rod of length l and area of cross-section A is heated from 0°C to 100°C. The rod is so placed that it is not allowed to increase in length, then the force developed is proportional to
[NCERT 1976]
Options:
A) l
B) $ {{l}^{-1}} $
C) A
D) $ {{A}^{-1}} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ F=YA\alpha \Delta \theta \
Therefore F\propto A $
BETA
