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// Additional solved examples , Example 20 , pg 339
rho=1.8*10^-8 //resistivity (in ohm*m)
Ef=4.8 //Fermi energy (in eV)
E=100 //electric field intensity (in V/m)
n=6.2*10^28 //concentration of electrons (in atoms/m^3)
e=1.6*10^-19 //charge in electron (in C)
Me=9.11*10^-31 //mass of electron (in Kg)
T=Me/(rho*n*e^2) //relaxation time
Un=(e*T)/Me //mobility of electron
Vd=(e*T*E)/Me //drift velocity
Vf=sqrt((2*Ef*e)/Me) //Fermi velocity
lam_m=Vf*T //mean free path
printf("Relaxation time of electron (in s)")
disp(T)
printf("Mobility of electron (in m^2/(V*s))")
disp(Un)
printf("Drift velocity of electron (in m/s)")
disp(Vd)
printf("Fermi velocity of electrons (in m/s)")
disp(Vf)
printf("Mean free path(in m)")
disp(lam_m)
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