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+//Section-12,Example-5,Page no.-SS.60
+//To find the Intrinsic and Extrinsic conductivity.
+clc;
+n_i=2.5*10^13
+u_n=3800
+u_e=1800
+N_Ge=4.41*10^22
+e=1.6*10^-19
+C_i=n_i*e*(u_n+u_e)
+disp(C_i,'Intrinsic conductivity(mho per cm)')
+N_D=N_Ge/10^7
+n=N_D                           //concentration of electrons
+p=((n_i)^2)/N_D                  //concentration of holes
+C_n=(e*(N_D)*(u_n))
+disp(C_n,'Conductivity of n-type germanium semiconductor(mho/cm)')