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clear//
//Variables
ND = 10**21 //Donor concentration (in per cubic-meter)
NA = 5 * 10**20 //Acceptor concentration (in per cubic-meter)
un = 0.18 //mobility of electron in silicon (in m**2 per volt-second)
q = 1.6 * 10**-19 //charge on electron (in Coulomb)
//Calculation
n = ND -NA //net donor density (in per cubic-meter)
sig = n * q * un //Conductivity (in Siemen per meter)
//Result
printf("\n Conductivity of silicon is %0.3f (ohm-meter)**-1." ,sig)
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