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clear;
clc;
printf("\nEx-6.20\n");
//page no.-192
//given
rho=1.7*10^-8;......//resistivity in ohm m
M=63.54;...........//atomic weight
d=8.96*10^3;......//density in Kg/m^3
N=6.025*10^23;......//avagadro no.
e=1.6*10^-19;.......//charge
no=(N*d)/M........//no of electrons per unit volume
printf("\nno. of electrons/ unit volume 8.50*10^28 /m^3\n");
mu=(1)/(rho*e*no).......//mobility in m/Vs
printf("\nmobility is 4.35*10^-3 m/Vs");
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