Question
Question: An iron bar of length 10 m is heated from 0°C to 100°C. If the coefficient of linear thermal expansi...
An iron bar of length 10 m is heated from 0°C to 100°C. If the coefficient of linear thermal expansion of iron is
10 × 10–6 /°C, the increase in the length of bar is
A
0.5 cm
B
1.0 cm
C
1.5 cm
D
2.0 cm
Answer
1.0 cm
Explanation
Solution
Increase in length ∆L = L0 α ∆θ
= 10 × 10 × 10–6 × (100 – 0) = 10–2 m = 1 cm