The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj – 2K2 will be ________________?

Related Mcqs:

The insulation ability of an insulator with the presence of moisture would_________________?

A. increase B. decrease C. remain unaffected D. may increase/decrease depending on temperature and thickness of insulation E. none of the above...

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...

Which of the following has least value of conductivity_________________?

A. glass B. water C. plastic D. rubber E. air...

The concept of overall coefficient of heat transfer is used in case of heat transfer by________________?

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

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...