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JEE Main 2021 (16 Mar, Shift 2) · Thermometry & Thermal Expansion

Thermometry & Thermal Expansion question from JEE Main 2021 (16 Mar, Shift 2)

Q48JEE Main 2021 · 16 MAR · SHIFT 2Easy

Thermometry & Thermal Expansion

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:

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Answer: (b)

In a cold bath both strips shrink, but A (larger $\alpha$ ) shrinks more.
The shorter strip lies on the inside of the curve, so the strip bends towards A.
A is on the left, so the answer is (b) bend towards the left.

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