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)

Explanation

Radius of curvature `R = (2t)/((alpha_(2) - alpha_(1))DeltaT)`
`R = (2 xx 1)/((32 - 19) xx 10^(-6) xx 50) = 30.77 m`