# A bimetallic strip consists of metals A and B.

Question:

A bimetallic strip consists of metals $\mathrm{A}$ and $\mathrm{B}$. It is mounted rigidly as shown. The metal A has higher coefficient of expansion compared to that of metal B. When the bimetallic strip is placed in a cold both, it will :

1. Bend towards the right

2. Not bend but shrink

3. Neither bend nor shrink

4. Bend towards the left

Correct Option: , 4

Solution:

(4)

$\alpha_{\mathrm{A}}>\alpha_{\mathrm{B}}$

Length of both strips will decrease $\Delta \mathrm{L}_{\mathrm{A}}>\Delta \mathrm{L}_{\mathrm{B}}$