A bimetallic strip of thickness `2 cm` consists of zinc and silver rivetted together. The approximate radium of curvature of the strip when heated through `50^(0)C` will be : (linear expansivity of zinc and silver are `32 xx 10^(-6//@)C` and `19 xx 10^(-6//@)C` respectively)

A bimetallic strip of thickness 2cm consists of zinc and silver rivetted together. The approximate radius of curvature of the strip when heated through 50°C will be (linear expansivity of zinc and silver are 32 xx 10^(-6)//°C and 19 xx 10^(-6)//°C respectively )

A steel scale is correct at 0^(@)C . The length of a brass tube measured by it at 40^(@)C is 4.5m . The correct length of the tube at 0^(@)C is (Coefficients of linear expansion of steel and brass are 11 xx 10^(-6//@)C and 19 xx 10^(-6//@)C respectively).

Two thin metal strips, one of brass and the other of iron are fastened together parallel to each other. Thickness of each strip is 1 mm. If the strips are of equal length at 0^(@)C . The radius of the are formed by the bimetallic strip when heated to 80^(@)C is (Coefficient of linear expansion of brass = 19xx10^(-6)//""^(@)C & of iron = 12xx10^(-6)//""^(@)C ).

Two thin metal strips, one of brass and the other of iron are fastended together parallel to each other. Thickness of each strip is 2 mm . If the strips are of equal length at 0^(@)C . The radius of the are formed by the bimetaalic strip when heated to 80^(@)C is (Coefficient of linear expansion of brass =19xx10^(-6)//^(@)C & of iron= 12xx10^(-6)//^(@)C) .

An iron sphere has a radius of 10 cm at 0°C. The change in volume of the sphere if it is heated to 100^(@)C (coefficient of linear expansion of iron = 11 xx 10^(-6)^(@) C^(-1) ) is