Mobility of electron and holes in a sample of intristic germanium at r – InterviewSolution

InterviewSolution

1.	Mobility of electron and holes in a sample of intristic germanium at room temperature are `0.36m^(2)V^(-1)s^(-1) and 0.17 m^(2)V^(-1)s^(-1)`. The electron and hole densities are each equal to `2.5xx10^(19) m^(-3)`. The electrical conductivity of germanium isA. `0.47Sm^(-1)`B. `1.09 Sm^(-1)`C. `2.12Sm^(-1)`D. `4.24 Sm^(-1)`
Answer» Correct Answer - C `sigma=1/rho=e(mu_(e)n_(e)+mu_(h)n_(h))` `=1.6xx10^(-19)[0.36+0.17]xx(2.5xx10^(19))` `=2.12Sm^(-1)`

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