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 $\Delta \mathrm{L}_{\mathrm{A}}>\Delta \mathrm{L}_{\mathrm{B}}$

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