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Q.

A bimetallic strip consists of metals X and Y. It is mounted rigidly at the base as shown.  The metal X has a higher coefficient of expansion compared to that for metal Y. When the bimetallic strip is placed in a cold bath:
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a

It will bend towards the right

b

It will bend towards the left

c

It will not bend but shrink

d

It will neither bend not shrink

answer is B.

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Detailed Solution

The  metal  X  has  a  higher  coefficient  of expansion  compared  to  that  for  metal  Y  so  when placing  bimetallic    strip  in  a  cold  bath,  X  will  shrink more than Y. Hence the strip will bend towards the left.

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