Question 334: Thermodynamics & KTG

Question

A bimetallic strip consists of metals A and 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 bath, it will :
![](https://imagex.cdn.examgoal.net/1kmiy26ad/161af264-9ef3-4acb-9a8d-8d76f732e948/e5359850-8a25-11eb-91cf-1f26b16dd4dd/file-1kmiy26ae.jpg)

Accepted Answer

Given, ${\alpha _A} > {\alpha _B}$
$ 	herefore $ $\Delta {L_A} > \Delta {L_B}$
So, A will contract more than B, so it will bend towards
left.
![](https://imagex.cdn.examgoal.net/1kqs7bwap/c562d7be-f761-4eb0-b55e-ff456f2abd39/111b1b10-de6e-11eb-8d10-0b7ad6e446c3/file-1kqs7bwaq.png)

Answer

Neither bend nor shrink

Answer

Bend towards the left

Answer

Not bend but shrink

Answer

Bend towards the right

Thermodynamics & KTG

A bimetallic strip consists of metals A and 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 bath, it will :

Choose the correct answer: