Heat and Mass Transfer
Fourier's law of heat conduction is valid for

One dimensional cases only
Two dimensional cases only
Regular surfaces having non-uniform temperature gradients
Three dimensional cases only

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Heat and Mass Transfer
Conduction is a process of heat transfer

From one particle of the body to another by the actual motion of the heated particles
None of these
From one particle of the body to another without the actual motion of the particles
From a hot body to a cold body, in a straight line, without affecting the intervening medium

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