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clear
//
//
//
//Variable declaration
ni=2.5*10^19; //concentration(per m^3)
d=4.4*10^28; //density(per m^3)
n=4*10^8; //number of Ge atoms
//Calculation
Na=d/n; //density of acceptor atoms
np=ni^2/Na;
npbyni=np/ni; //ratio of density of electrons
//Result
printf("\n ratio of density of electrons is %0.3f ",npbyni)
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