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Mobility of electrons in a semiconductor...

Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type semiconuctor, the density of electrons is `10^(19)m^(-3)` and their mobility is `1.6m^(2)//(V.s)` then the resistivity of te semiconductor (since it is an n-type semiconductor contribution of holes is ignored) is close to :

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