According to Stefan’s law, the total radiation from a black body per second per unit area is proportional to____________________?

Related Mcqs:

Heat transfer takes place as per ________________?

A. zeroth law of thermodynamics B. first law of thermodynamic C. second law of the thermodynamics D. Kirchoff’s law E. Stefan’s law...

Metals are good conductors of heat because________________?

A. their atoms collide frequently B. their atoms-are relatively far apart C. they contain free electrons D. they have high density E. all of the above...

Moisture would find its way into insulation by vapour pressure unless it is prevented by __________________ ?

A. high thickness of insulation B. high vapour pressure C. less thermal conductivity insulator D. a vapour seal E. all of the above...

In counter flow heat exchangers_________________?

A. both the fluids at inlet (of heat ex¬changer where hot fluid enters) are in their coldest state B. both the fluids at inlet are in their hot¬test state C. both the fluids .at exit are in their hottest state D. one fluid is in hottest state and other in coldest state at inlet E. … In counter flow heat exchangers_________________?Read More...

The unit of Stefan Boltzmann constant is ____________________?

A. watt/cm2 °K B. watt/cm4 °K C. watt2/cm °K4 D. watt/cm2 °K4 E. watt/cm2 °K2...