1.

The volume of a metal sphere increases by 0 cdot 24% when its temperature is raised by 40^(@)C. The coefficient of linear expansion of the metal is…""^(@)C^(-1):

Answer»

`2xx10^(-5)`
`18xx10^(-5)`
`6xx10^(-5)`
`1 cdot2 xx10^(-5)`

Solution :`V=V_(0)(1+gamma Delta T)`
`RARR gamma =(V-V_(0))/(V_(0) Delta T)=(0 cdot 24)/(100xx40)=6xx10^(-5)""^(@)C^(-1)`
Now `alpha =(gamma)/(3) =2xx10^(-5)^""(@)C^(-1)`
`THEREFORE` Correct choice (a).


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