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Q.

A thin bimetallic strip consists of metals A and B. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic script is placed in a cold bath, it will:

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a

Bends towards  right 

b

Neither bends nor shrinks

c

Not bends but shrinks

d

Bends towards left

answer is D.

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Detailed Solution

since αA>αB  so contraction of A is more as compared to B when temperature decreases

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