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NEET2002PhysicsThermal Properties of MatterActual

For a black body at temperature 727^ C , its radiating power is 60 ~W and the temperature of surrounding is 227^ C . If temperature of the black body is changed to 1227^ C , then its radiating power will be:

Options

  1. A304 ~W
  2. B320 ~W
  3. C240 ~W
  4. D120 ~W

Correct answer

B. 320 ~W

Step-by-step solution

We can use the formula aligned & P (T₄-T₀^4 ) & P₂ P₁ = (1500)^4-(500)^4 (1000)^4-(500)^4 & = 500^4 (3^4-1 ) 500^4 (2^4-1 ) & P₂ 60 = 80 15 P₂=320 ~W aligned

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