Question

A bimetallic strip is made up of two metals with different $\alpha$ :

• A. On heating, it bends towards the metal with high $\alpha$
• B. On heating, it bends towards the metal with low $\alpha$
• C. On cooling, it bends towards the metal with high $\alpha$
• D. On cooling, it bends towards the metal with low $\alpha$

Answer 1

Answer: (B), (C)

When temperature increases of a bimetallic strip, the one which is having more value of coefficient of expansion will expand more so the strip will bend toward the metal with low value of coefficient of expansion and it will beind toward high value of coefficient of expansion if it is cooled.