Questions
Two straight metallic strips each of thickness t and length l are rivertted together. Their coefficients of linear expansions are and ar. If they are heated through temperature , the bimetallic strip will bend to form an arc of radius
detailed solution
Correct option is B
Let the angle subtended by the arc formed be θ. Thenθ=lr or θ=ΔLΔr=l2−l1r1−r2∴ θ=lα2−α1ΔTt or lr=lα2−α1ΔTtSo, r=tα2−α1ΔTTalk to our academic expert!
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