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JEE Main202116 Mar 2021Evening ShiftPhysicsThermal Properties of MatterActual

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 both, it will :

Options

  1. ABend towards the right
  2. BNot bend but shrink
  3. CNeither bend nor shrink
  4. DBend towards the left

Correct answer

D. Bend towards the left

Step-by-step solution

α A > α B Length of both strips will decrease Δ L A > Δ L B

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