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+clear;
+clc;
+l=10*10^-6 //length in m
+f=10*10^9 //frequency in Hz
+n=2*10^14 // n type doping concentration in cm^-3
+e=1.6*10^-19 //in J
+E=3200 //electric field in V/cm
+
+//Calculation
+vd=l*f //converting from m^2 to cm^2
+J=e*n*vd
+myu=-vd/E
+
+format("v",7)
+disp(vd,"Drift velocity (cms^-1)= ")
+format("v",9)
+disp(J,"current density (A/cm^2)= ")
+disp(myu,"negative electron mobility (cm^2/Vs)= ") //The answer provided in the textbook is wrong