// Example 9.20;//thickness clc; clear; close; A=1.5;//area in mili meter square R=100;//resistance in ohms Eo=1.04*10^-10;//F/m Vd=10^7;//DRIFT VELOCITY IN m/s w=round((sqrt(R*Eo*A*10^-6*Vd))*10^6);//thickness in micro meters disp(w,"thickness in micro meters is")