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Two identical thin metal strips one of aluminium and the other of iron are riveted together to form a bimetallic strip. The temperature is raised by `50^(@)C`. If the central planes of the two strips are separated by 2nm and the coefficients of thermal expansion of aluminium and iron are respectively `30 xx 10^(-6)//^(@)C` and `10 xx 10^(-6)//^(@)C` the average radius of curvature of the bimetallic strip is aboutA. 50 cmB. 100 cmC. 150 cmD. 200 cm |
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Answer» Correct Answer - D `R=(d)/((Delta alpha)t)=(2xx 10^(-3))/((20xx10^(-6))(50))=2m`. |
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