The rates of heat radiation from two patches of skin each of area A, on a patient’s chest differ by 2%. If the patch of the lower temp is at 300K and emissivity of both the patches is assumed to be unity, the temp. of other patch would be.
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a
306K
b
312K
c
308.5K
d
301.5K
answer is D.
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Detailed Solution
P=σAT4P∝T4⇒ΔPP×100=4ΔTT×100∴temp of other patch =T±ΔT