clear
//
//
//

//Variable declaration
mew_e=0.13    //mobility of electron(m**2/Vs)
mew_h=0.05    //mobility of holes(m**2/Vs)
e=1.6*10**-19
ni=1.5*10**16      //number of electron hole pairs
N=5*10**28

//Calculation
sigma1=ni*e*(mew_e+mew_h)    //intrinsic conductivity(ohm-1 m-1)
ND=N/10**8
n=ni**2/ND
sigma2=ND*e*mew_e     //conductivity(ohm-1 m-1)
sigma3=ND*e*mew_h     //conductivity(ohm-1 m-1)

//Result
printf("\n intrinsic conductivity is %0.3f *10**-3 ohm-1 m-1 %0.3f ",sigma1*10**3,sigma2)
printf("\n conductivity during donor impurity is %0.3f  ohm-1 m-1",sigma2)
printf("\n conductivity during acceptor impurity is %0.0f  ohm-1 m-1",sigma3)