Discussion Forum



1)

A metallic bar is heated from 0° C to 100°  C. The coefficient of linear expansion is 10−5K−1. What will be the percentage increase in length


A) 0.01%

B) 0.1%

C) 1%

D) 10%

Answer:

Option B

Explanation:

△ll=α△T=10−5×100=10−3

△ll×100 %  =10−3×100=10−1=0.1 %