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Question 30873
JEE Physics · Hard

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

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RadiationHardQuestion 30873

Question

If temperature of a black body doubles, power radiated becomes:
  1. A
    2 times
  2. B
    4 times
  3. C
    8 times
  4. D
    16 times
    Correct

Correct answer

16 times

Explanation

P ∝ T⁴. If T → 2T, P → (2T)⁴ = 16T⁴. Power increases 16 times.

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