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The intrinsic conductivity of germanium ...

The intrinsic conductivity of germanium at `27^(@)` is 2.13 mho `m^(-1)` and mobilities of electrons and holes are 0.38 and `0.18 m^(2) V^(-1) s^(-1)` respectively. The density of charge carriers is

A

`2.37 xx 10^(19) m^(-3)`

B

`3.28 xx 10^(19) m^(-3)`

C

`7.83 xx 10^(19) m^(-3)`

D

`8.47 xx 10^(19) m^(-3)`

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