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Question 30876
JEE Physics · Hard

Elasticity, Thermal Expansion, Calorimetry and Heat Transfer: Radiation MCQ

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RadiationHardQuestion 30876

Question

Emissivity of a surface is 0.6. If it radiates 600 W, a perfect black body of same area and temperature would radiate:
  1. A
    360 W
  2. B
    600 W
  3. C
    1000 W
    Correct
  4. D
    400 W

Correct answer

1000 W

Explanation

P_actual = ε × P_blackbody. 600 = 0.6 × P_bb → P_bb = 1000 W.

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