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If a bimetallic strip is heated then when the strip is vertical 

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a

higher 'α'  material loss convex shape

b

higher 'α'  material gains concave shape

c

higher  'α' material loss concave shape

d

higher 'α'  material gains convex shape

answer is C.

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Detailed Solution

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material with higher coefficient of linear expansion , expands more than the other one, hence it takes convex shape

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