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//Variable declaration
mewe=0.36; //mobility of electrons(m**2/Vs)
mewh=0.17; //mobility of holes(m**2/Vs)
e=1.6*10**-19;
rhoi=2.12; //resistivity(ohm m)
//Calculation
ni=1/(rhoi*e*(mewe+mewh)); //intrinsic concentration(per m**3)
//Result
printf('intrinsic concentration is %0.3f *10**16 per m**3 \n',(ni/10**16))
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