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+// Exa 1.11
+clc;
+clear;
+close;
+format('v',10)
+// Given data
+rho = 3000;// in ohm-m
+n = 1.1*10^6;// in /m^3
+e = 1.6*10^-19;// in C
+//miu_e = 3*miu_h   (i)
+// miu_e+miu_h = 1/(rho*e*n)    (ii)
+// From eq (i) and (ii)
+miu_h = (1/(rho*e*n))/4;// in m^2/V-s
+disp(miu_h,"The holes mobility in m^2/V-s is");
+miu_e = 3*miu_h;// in m^2/V-s
+disp(miu_e,"The electron mobility in m^2/V-s is");
+
+// Note: The calculated value of hole mobility is wrong .