A radiator in a domestic heating system operates at a surface temperat – McqOptions

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1.	A radiator in a domestic heating system operates at a surface temperature of 55°C. Assuming the radiator behaves as a black body, the rate at which it emits the radiant heat per unit area is (assume σ = 5.67 × 10-8 W/(m2K4))
A.	0.66 kW/m2
B.	0.0005 kW/m2
C.	0.5 kW/m2
D.	66 kW/m2
Answer» B. 0.0005 kW/m2

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