Home

What is the correct answer?

4

Thermal conductivity of air with rise in temperature

A. Increases

B. Decreases

C. Remain constant

D. May increase or decrease depending on temperature

Correct Answer :

A. Increases


Related Questions

Emissivity of a white polished body in comparison to a black body is When heat is transferred from one particle of hot body to another by actual… Which of the following statement is wrong? A grey body is one whose absorptivity Thermal conductivity of water ________ with rise in temperature. The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x.… According of Kirchhoff's law Thermal diffusivity is Total heat is the heat required to The heat transfer by conduction through a thick cylinder (Q) is given… The automobile radiator is a heat exchanger of Film coefficient is defined as the ratio of The heat is transferred by conduction, convection and radiation in Thermal conductivity of a material may be defined as the Metals are good conductors of heat because LMTD in case of counter flow heat exchanger as compared to parallel flow… In heat transfer, conductance equals conductivity (kcal/hr/sq.m/ °C/cm)… The rate of energy emission from unit surface area through unit solid… The ratio of the emissive power and absorptive power of all bodies is… According to Wien's law, the wavelength corresponding to maximum energy… When α is absorptivity, ρ is reflectivity and τ is transmissivity,… When heat is transferred from hot body to cold body, in a straight line,… The heat transfer from a hot body to a cold body is directly proportional… The amount of radiation mainly depends upon the Which of the following is a case of steady state heat transfer? Thermal conductivity of solid metals with rise in temperature normally The unit of Stefan-Boltzmann constant is The ratio of the thickness of thermal boundary layer to the thickness… Depending on the radiating properties, a body will be black when The heat of sun reaches to us according to