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clear//
//Variables
p = 100.0 //resistivity (in ohm-meter)
q = 1.6 * 10**-19 //Charge on a electron (in Coulomb)
un = 0.36 //donor concentration (in per cubic-meter)
//Calculation
sig = 1/p //conductivity (in siemen per meter)
n = sig /(q * un) //intrinsic concentration (in per cubic-meter)
ND = n //Donor concentration (in per cubic-meter)
//Result
printf("\n Donor concentration is %0.3f m**-3.",ND)
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