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//Variable declaration
A=10*10**-6; //area(m**2)
ne=1; //number of electrons
I=100; //current(amperes)
w=63.5; //atomic weight
e=1.6*10**-19; //charge(c)
D=8.92*10**3; //density(kg/m**3)
Na=6.02*10**26; //avagadro number(per k mol)
//Calculation
n=ne*Na*D/w;
J=I/A;
vd=J/(n*e); //drift velocity of free electrons(m/s)
//Result
printf('drift velocity of free electrons is %0.3f *10**-3 m/s \n',(vd*10**3))
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