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COMEDK2015PhysicsThermal Properties of Matter

The temperature of two bodies A and B are 727^ C and 327^ C respectively, the ratio H_ A : H_ B of the rates of heat radiated by them is

Options

  1. A727: 327
  2. B5: 3
  3. C25: 9
  4. D625: 81

Correct answer

D. 625: 81

Step-by-step solution

Given, T_ A =727^ C and T_ B =327^ C As we know, rate of heat radiated, Q T⁴ Q_ A Q_ B = H_ A H_ B = ( 273+727 273+327 )⁴= 625 81

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