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+// Example 3.1
+// Computation for mobility of the free electrons in aluminium//
+// Page no.61
+
+clc;
+clear;
+close;
+
+//Given data ;
+d=2.70*10^3//2.70*10^3 kg/m3
+v=3;//3 electrons/atom
+A=26.98;
+M=1.660*10^-27;//1.660*10^-27 kg/atom
+e=1.60*10^-19;
+R=3.44*10^-8;//R=resistivity
+
+//...................................(B)....................................//
+
+//Calculation for concentration of the free electrons in aluminium//
+n=(d*v)/(A*M);
+
+//Calculation for mobility of the free electrons in aluminium//
+mu=10^4/(n*e*R);//mu=mobility of the free electrons
+
+
+
+//Displaying the result in command window
+printf('\n Concentration of the free electrons in aluminium = %0.3f x 10^29 electron/m3',n*10^-29);
+printf('\n \n Mobility of the free electrons in aluminium = %0.2f cm2/V sec',mu);
+
+
+
+//Answers are varying due to round off error//