Question

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
• B. It will bend towards the left
• C. It will not bend but shrink
• D. It will neither bend nor shrink

Answer 1

Answer: (B)

It will bend towards the left

As coefficient of thermal expansion of $X$ is more. On cooling, it will shrink more. So the strip will bend towards the left.