Calculate conductivity of a germanium sample if a donar impurity atoms are added to the extent to one part in 106 germanium atoms at room temperature.
Assume that only one electron of each atom takes part in conduction process.
Given:- Avogadro’s number = 6.023 × 1023 atom/gm-mol .
Atomic weight of Ge = 72.6
Mobility of electrons = 3800` (cm^2) / ( "volts") `sec
Density of Ge = 5.32 gm/ cm3