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// Exa1.21.4
clc;
clear;
close;
// Given data
Rho = 0.3623 * 10^-3;// in Ohm m
Sigma = 1/Rho;//in mho/m
D = 4.42 * 10^28;// Ge density in atom/m^3
n_d = D / 10^6;// in atom/m^3
e = 1.6 * 10^-19;// in C
Mu = Sigma/(n_d * e);// in m^2/V.sec
disp(Mu,"The mobility of electron in germanium in m^2/V.sec is");
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