The surface of a black body is at a temperature 
and its cross-section is 
. Heat radiated from this surface in one minute in joules is (Stefan's constant 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Given,
Temperature of black body surface,
Cross-sectional area of black body, 
Stefan's constant, 
From the Stefan-Boltzmann law, energy radiated by a body is,
Heat radiated from black body surface in one minute,
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