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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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Two straight metallic strips each of thickness tt and length ℓ\ell are rivetted together. Their coefficients of linear expansions are α1\alpha_1 and α2\alpha_2. If they are heated through temperature ΔT\Delta T, the bimetallic strip will bend to form an arc of radius
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Correct option: B
t/{(α2−α1)ΔT}t /\left\{\left(\alpha_2-\alpha_1\right) \Delta T\right\}
Option B (t/((α2−α1)ΔT)t / ((\alpha_2 - \alpha_1) \Delta T)) is correct because it represents the radius of curvature of a bimetallic strip based on the difference in linear expansion coefficients.

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