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Explain linear expansion of solid. |
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Answer» Solution :`(i)` The INCREASE in length of a body due to the increase in its temperature is called linear expansion. `(II)` In solids, for a small change in temperature `DeltaT`, the fractional change in length is directly PROPORTIONAL to `DeltaT`.   `(DELTAL)/(L)=alpha_(L)DeltaT` `alpha_(L)=(DeltaL)/(LDeltaT)` `(iii)` Where, `alpha_(L)=` COEFFICIENT of linear expansion. `DeltaL=` Change in length `L=` Original length `DeltaL=` Change in temperature |
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