What is the unit of coefficient of linear expansion ? (1marks)
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Answer:
Per degree Celsius
And in SI system per kelvin
Explanation:
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Expansion means, change or increase in length. If the change in length is along one dimension (length) over the volume, then it is called linear expansion. Here the reason behind the expansion is the change in temperature Thus, it is implied that the change in temperature will reflect in the rate of expansion. How much material can withstand its original shape and size when it is illuminated by the heat radiation is well explained using this concept.
Coefficient of Linear Expansion Formula
The coefficient of linear expansion can be mathematically written as:
αL=dLdT
Where,
αL is the coefficient of linear expansion.
dL is the unit change in length
dT is the unit change in temperature
The S.I unit is: ∘C−1orK−1