The ratio of the energy absorbed by the body to total energy falling on it is called_________________?

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...

Thermal conductivity of a material may be defined as the________________?

A. quantity of heat flowing in one second through one cm cube of material when opposite faces ^re maintained at a temperature difference of 1°C B. quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C … Thermal conductivity of a material may be defined as the________________?Read More...

In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by___________________?

A. convection B. radiation C. conduction D. both convection and conduction E. none of the above...

Planck’s law holds good for________________?

A. black bodies B. polished bodies C. all coloured bodies D. all of the above E. none of the above...

Depending on the radiating properties, a body will be opaque when _________________?

A. p = 0, x = 0 and a = 1 B. p=l,x = 0anda = 0 C. p = 0, x = 1 and a = 0 D. x – 0, a + p = 1 E. a=0,x + p= 1. where a = absorptivity, p = reflectivity, X = transmissivity...