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On doping germanium with donor atoms of ...

On doping germanium with donor atoms of density `10^(17)cm^(-3)`, find its conductivity if mobility of electrons is `3800 cm^(2)//V-s` and intrinsic carrier concentration is `2.5xx10^(13)cm^(-3)`. Also find the ratio of conductivity of doped germanium and pure germanium.

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