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PhysicsHeat & ThermoThermal ExpansionEasy2 minPYQ_2021

PhysicsEasysingle choice

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 :

Options:

Answer:

Solution:

$α_{A} > α_{B}$ , so on cooling $Δ L_{A} > Δ L_{B}$ : A shortens more. The shorter side is on the inside of the bend, so the strip bends towards A, the left. Answer D.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion

⏱ 2mℹ️ Source: PYQ_2021

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