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Que. With variable thermal conductivity, Fourier law of heat conduction through a plane wall can be expressed as
a. Q = -k0 (1 + β t) A d t/d x
b. Q = k0 (1 + β t) A d t/d x
c. Q = – (1 + β t) A d t/d x
d. Q = (1 + β t) A d t/d x
Correct Answer:Q = -k0 (1 + β t) A d t/d x
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