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Mention the relation between change in length and coefficient of linear expansion?

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The equation relating the change in length and the change in temperature of a body is given below: 

\(\frac{ΔL}{L_0}\)= αL ΔT 

ΔL – Change in length (Final length – Original length) 

L0 – Original length 

ΔT – Change in temperature (Final temperature – Initial temperature)

αL – Coefficient of linear expansion.

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