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There is a temperature difference of 1K between two black patches of skin on patient’s chest and each patch having area A. The radiant heat emitted from them is differ by 2 % , then temperatures of two patches may be.

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300 K, 301 K

100 K, 101 K

400 K, 401 K

200 K, 201 K

answer is C.

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Detailed Solution

$\begin{array}{l} P = {σAT}^{4} \\ \frac{ΔP}{P} \times 100 = 4 (\frac{ΔT}{T} \times 100); T_{2} = T_{1} \pm ΔT \end{array}$

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