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Manipal MET2021PhysicsThermal Properties of Matter

A thin copper wire of length L increases in length by 1 % , when heated from T₁ to T₂ . What is the percentage change in area when a thin copper plate having dimensions (10 L 2 L) is heated from T₁ to T₂ ?

Options

  1. A2 %
  2. B20 %
  3. C10 %
  4. D40 %

Correct answer

A. 2 %

Step-by-step solution

aligned A & =10 L 2 L=20 L^2 A A 100 & =2 L L 100=2 1=2 % aligned

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