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 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 or shrink

Answer 1

Answer: (B)

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