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Most Important Selected Qs for JEE AdvancedPhysicsThermal Properties of Matter

Four rods A, B, C, D of same length and material but of different radii r, r 2 , r 3 and 2 r respectively are held between two rigid walls. The temperature of all rods is increased by same amount. If the rods do not bend, then

Options

  1. Athe stress in the rods are in the ratio 1: 2: 3: 4 .
  2. Bthe force on the rods exerted by the wall are in the ratio 1: 2: 3: 4 .
  3. Cthe energy stored in the rods due to elasticity are in the ratio 1: 2: 3: 4 .
  4. Dthe strains produced in the rods are in the ratio 1: 2: 3: 4 .

Correct answer

C. the energy stored in the rods due to elasticity are in the ratio 1: 2: 3: 4 .

Step-by-step solution

Strain will remain same. Stress =Y will remain same. Force = YA Energy = 1 2 ( stress )( strain )( volume )

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