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clc//
//
//
//Variable declaration
T=300; //temperature(K)
k=1.38*10^-23; //boltzmann constant
m=9.109*10^-31; //mass(kg)
h=6.626*10^-34; //plancks constant
Eg=0.7; //energy(eV)
e=1.6*10^-19;
//Calculation
x=(2*%pi*m*k/h^2)^(3/2);
y=exp(-Eg*e/(2*k*T));
ni=2*x*(T^(3/2))*y; //concentration of intrinsic charge carriers(per m^3)
//Result
printf("\n concentration of intrinsic charge carriers is %0.2f *10^18 per m^3",ni/10^18)
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