What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? (The surface area of body = 2m^2, σ = 5.67*10^-8W/ m^2K^4 & emissivity of 0.4).

What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? (The surface area of body = 2m^2, σ = 5.67*10^-8W/ m^2K^4 & emissivity of 0.4).

(a) 122.4W

(b) 0.47W

(c) 33W

(d) 86W

I have been asked this question during an online exam.

The above asked question is from Thermal Properties of Matter topic in division Thermal Properties of Matter of Physics – Class 11

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What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? (The surface area of body = 2m^2, σ = 5.67*10^-8W/ m^2K^4 & emissivity of 0.4).

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