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When a strip made of iron ( $α_{1}$ ) and copper $α_{2} (> α_{1})$ is heated:

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its length does not change

it gets twisted

it bends with iron on concave side

it bends with iron on convex side

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detailed solution

Correct option is C

A bimetallic strip consists of two metals of different expansion coefficients.if α2>α1, the strip bends with iron on concave side

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When a strip made of iron (α1) and copper α2(>α1) is heated:

Remember concepts with our Masterclasses.

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When a strip made of iron ( $α_{1}$ ) and copper $α_{2} (> α_{1})$ is heated: