Planck’s law holds good for________________?

Related Mcqs:

When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by __________________?

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

Thermal conductivity of air with rise in temperature__________________?

A. increases B. decreases C. remains constant D. may increase or decrease depending on temperature E. none of the above...

Thermal conductivity of wood depends on_______________?

A. moisture B. density C. temperature D. all of the above E. none of the above...

Joule sec is the unit of_________________?

A. universal gas constant B. kinematic viscosity C. thermal conductivity D. Planck’s constant E. none of the above...

Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by ___________________?

A. convection B. free convection C. forced convection D. radiation E. radiation and convection...