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+// Exa 2.32
+clc;
+clear;
+close;
+// Given data
+e=1.6*10^-19;// in C
+miu_e= 3800;// in cm v-s
+miu_p= 1800;// in cm v-s
+ni= 2.5*10^13;// per cm^3
+N_D= 4.4*10^22*10^-7;// per cm^3
+n=N_D;// per cm^3
+p= ni^2/N_D;// holes/cm^3
+sigma_i= ni*e*(miu_e+miu_p);// in (Ωcm)^-1
+sigma_n= e*N_D*miu_e;// in (Ωcm)^-1
+disp(sigma_i,"Intrinsic conductivity in (Ωcm)^-1 is : ")
+disp(n,"Concentration of electrons per cm^3 is : ")
+disp(p,"Concentration of holes per cm^3 is : ")
+disp(sigma_n,"The conductivity in n-type Ge semiconductor in (Ωcm)^-1 is : ")