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MHT CET2011PhysicsThermal Properties of Matter

A black body at a temperature of 227^ C radiates heat energy at the rate 5 cal / cm ²- s . At a temperature of 727^ C , the rate of heat radiated per unit area in cal / cm ² will be

Options

  1. A80
  2. B160
  3. C250
  4. D500

Correct answer

A. 80

Step-by-step solution

E₂ E₁ = ( T₂ T₁ )⁴ array l E₂ E₁ = ( 273+727 273+227 )⁴ E₂ 5 = (1000)⁴ (500)⁴ =16 E₂=80 cal / cm ² array

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