A steel scale is correct at 0^(@)C. The ...

A steel scale is correct at `0^(@)C`. The length of a brass tube measured by it at `40^(@)C` is 4.5 m. The correct length of the tube at `0^(@)C` is (Coefficients of linear expansion of steel and brass are `11xx10^(-6)//""^(@)Cand19xx10^(-6)//""^(@)C` respectively.)

4.001 m

5.001 m

4.499 m

4.501 m

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A piece of copper wire has a length of 2m at 10^(@)C . Its length at 100^(@)C is (Coefficient of linear expansion of copper = 17xx10^(-6)//""^(@)C )

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A thin brass sheet at 10^(@)C and a thin stell sheet at 20^(@)C have the same surface area. The common temperature at which both would have the same area is (coefficient of liner expansion for brass and steel are respectively 19xx10^(-6//@)C and 11xx10^(-6//@)C) .

AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-2

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