A typical n-type GaAs Gunn diode has electron density of n=1018 /cm3 , electron density and mobility at lower valley nl=1016/m3 and μl= 8000 cm2 /Vs , electron density and mobility at upper valley nu=1014/m3 and μu=180 cm2 /Vs temperature T=300K. Determine the conductivity and resistivity of the diode and show parametric values on typical graph of 2 valley model theory.

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.