1.

Define coefficient of linear expansion. Write its equation.

Answer»

Solution :(i) The RATIO of increase in length of the length of the body per degree rise in temperature is called 'Coefficient of LINEAR expansion'.
(ii) Its SI unit is per kelvin.
`(DeltaL)/(L_(0)) = alpha_(L)DELTAT IMPLIES alpha_(L) = (DeltaL)/(DeltaT.L_(0))`
`deltaL`-change in length
`L_(0)`- ORIGINAL length
`DeltaT`-Change in temperature
`alpha_(L)`-coefficient of linear expansion.


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