You are given the following for a GaAs crystal: Area of the GaAs =1cm3 , and the length of the crystal, L= 1 cm. The atomic concentration of GaAS: NGaAs =5x1022/cm3 ni = 2.1x106 /cm3 e=8500 cm2V-1.s-1 h=400 cm2V-1s-1 Charge , e = 1.6x10-19 C Resistivity, = 3.34x108 (.cm) =1/ Please only answer for undergraduates

IV. You are given the following for a GaAs crystal: Area of the GaAs =1cm3, and the length of the crystal, L=1cm. The atomic concentration of GaAS: NGaAs=51022/cm3 ni=2.1106/cm3e=8500cm2V1s1h=400cm2V1s1Charge,e=1.61019CResistivity,=3.34108(.cm)=1/ 1(a) For Undergraduates only: Calculate conductivity, (1cm1) of GaAs (10 points) 1(b) For Graduates only: Calculate conductivity, (1cm1) of Ge and GaAs (20 points) 2(a). For Undergraduates only: What is the resistance [R], in , of the GaAs crystal when doped with Phosphorous (P) with one ppb (1109)..... using R=L/A (10 poi