Why is the negative sign introduced in the equation of Fourier's law – McqOptions

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1.	Why is the negative sign introduced in the equation of Fourier's law of heat conduction? q = – kA (dT / dx)
A.	because heat transfer rate is inversely proportional to temperature gradient
B.	because value of thermal conductivity k is negative
C.	because heat is transferred from higher temperature to lower temperature
D.	none of the above
Answer» D. none of the above

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