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# A bimetallic strip of thickness 2cm consists of zinc and silver riveted together. The approximate radius of curvature of the strip when heated through  ${50}^{0}C$ will be

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a
30.77m
b
61.54m
c
15.38m
d
7.69m
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detailed solution

Correct option is A

radius of curvature of a bimetallic strip when its temperature is changed through Δt is R=dα1~α2Δtmeter here d is strip width=2×10−2m; α1,α2 are coefficients of linear expansion of zinc=32×10−6/C  0 and silver=19×10−6/C  0; R=2×10−232×10−6−19×10−650 R=2×10−213×10−6×50 R=265×103=30.769 R=30.77m

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