STANDARDPhysics-Thermodynamics
STANDARD Physics Black Body Radiation MCQ Question
Type: MCQ-conceptual-Medium-Class 11
If the temperature of hot black body is raised by 5%, rate of heat energy radiated would be increased by how much percentage?
A
12%
B
22%
C
32%
D
42%
Correct Answer
Option B
Detailed Explanation
According to Stefan's law, rate of energy radiated by a black body at absolute temperature T is given by H = AσT⁴. When the temperature is increased by 5%, the new temperature T' = 1.05T. The rate of heat energy radiated increases by (1.05)⁴ - 1 ≈ 22%.
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