Fourier’s law of heat conduction is valid for_________________?

Related Mcqs:

Heat transfer in liquid and gases takes place by_____________________?

A. conduction B. convection C. radiation D. conduction and convection E. convection and radiation...

The amount of heat flow through a body by conduction is_______________?

A. directly proportional to the surface area of the body B. directly proportional to the temperature difference on the two faces of the body C. dependent upon the material of the body D. inversely proportional to the thickness of the body E. all of the above...

Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called__________________?

A. thermal resistance B. thermal coefficient C. temperature gradient D. thermal conductivity E. heat-transfer...

Thermal diffusivity of a substance is __________________?

A. directly proportional to thermal con¬ductivity B. inversely proportional to density of substance C. inversely proportional to specific heat D. all of the above E. none of the above...

40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?

A. 0.45 B. 0.55 C. 0.40 D. 0.75 E. 0.60...