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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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When a bimetallic strip made of iron (α1)\left( {{\alpha _1}} \right) and copper (α2)\left( {{\alpha _2}} \right) is heated (α2>α1)\left( {{\alpha _2} > {\alpha _1}} \right)
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Correct option: C
It bends with iron on concave side
Option D is correct because when a bimetallic strip is heated, the metal with the higher coefficient of thermal expansion (copper) expands more, causing the strip to bend with the metal having smaller expansion (iron) on the concave side.

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