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10-1.Thermometry, Thermal Expansion and Calorimetry
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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 \times 10^{-6}{°C^{-1}}$, the increase in the length of bar is .......... $cm$
A
$0.5 $
B
$1.0$
C
$1.5$
D
$2.0$
Solution
(b) Increase in length $\Delta L = L_0 \alpha \Delta \theta$
$= 10 \times 10 \times 10^{-6} \times (100 -0) = 10^{-2} m = 1 cm$
Standard 11
Physics
