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diff --git a/3020/CH16/EX16.6/ex16_6.sce b/3020/CH16/EX16.6/ex16_6.sce
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+clc;
+clear all;
+e = 1.6e-19; // Charge of an electron
+m = 9.11e-31; // Mass of an electron in Kg
+rho = 6.8e7 ; // Conductivity of silver in 1/(ohm.meter)
+at = 107.9; // Atomic weight of copper in gm
+d = 10.5e3; // Density of silver in Kg per cubic meter
+N = 6.023e26; // Avagadros number
+n = (N*d)/at; //Density of electrons
+disp('atoms/m^3',n,'The density of electrons is')
+u = (rho/(n*e)); // Mobility of electron
+disp('(m^2.V)/s',u,'The mobility of electron is')