Properties Of Solids And Liquids Question 581
Question: An iron bar of length 10 m is heated from $ 0{}^\circ C $ to $ 100{}^\circ C $ . If the coefficient of linear thermal expansion of iron is $ 10\times {{10}^{6}}/{}^\circ C $ , the increase in the length of bar is
Options:
A) 0.5 cm
B) 1.0 cm
C) 1.5 cm
D) 2.0 cm
Show Answer
Answer:
Correct Answer: B
Solution:
Increase in length$ \Delta L=L _{0}\alpha \Delta \theta $
$ =10\times 10\times {{10}^{-6}}\times (100-0)={{10}^{-2}}m=1cm $
