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10.1, thermonetry,thermal expansion and calorimetry — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics10.1, thermonetry,thermal expansion and calorimetry1 Mark
MCQ
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:
  • A
    It will bend towards the right
  • ✓
    It will bend towards the left
  • C
    It will not bend but shrink
  • D
    It will neither bend nor shrink
✓

Answer

Correct option: B.
It will bend towards the left
b
As coefficient of thermal expansion of $X$ is more. On cooling, it will shrink more. So the strip will bend towards the left.

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