Engineering :: Thermodynamics

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A wall 50 mm thick (thermal conductivity k = 40 W/m?C) has temperature difference on two surfaces of 100?C. What could probably change if the temperature difference of this wall drops to 100?C

[A].	Thermal conductivity changes to 400 W/?C	[B].	Area of heat transfer increases 10 times
[C].	Thickness of wall increases to 500 mm	[D].	Thickness of wall reduces to 5 mm
[E].	Rate of heat flow drops to one tenth of the original

Answer: Option E

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