Properties Of Solids And Liquids Question 494
Question: A metal rod of silver at 0°C is heated to 100°C. It’s length is increased by 0.19 cm. Coefficient of cubical expansion of the silver rod is [UPSEAT 2001]
Options:
A) 5.7 ´ 10?5/°C
B) 0.63 ´ 10?5/°C
C) 1.9 ´ 10?5/°C
D) 16.1 ´ 10?5/°C
Show Answer
Answer:
Correct Answer: A
Solution:
$ \alpha =\frac{\Delta L}{L _{0}(\Delta \theta )} $
$ =\frac{0.19}{100(100-0)}=1.9\times {{10}^{-5}}/{}^\circ C $
Now g = 3a = 3 ´ 1.9 ´ 10?5/°C = 5.7 ´ 10?5/°C
