Mobilities of electrons and holes in a sample of intrinsic germanium at room temperature are 0.36m^2/ /"volt"-sec and 0.17m^2//"volt"-sec respectively. If the electrons and hole densities are each equal to 2.5xx10^19//m^3, calculate the conductivity.

Mobilities of electrons and holes in a sample of intrinsic germanium a

1.	Mobilities of electrons and holes in a sample of intrinsic germanium at room temperature are 0.36m^2/ /"volt"-sec and 0.17m^2//"volt"-sec respectively. If the electrons and hole densities are each equal to 2.5xx10^19//m^3, calculate the conductivity.
Answer» Solution :The CONDUCTIVITY of an INTRINSIC semiconductor is GIVEN by :`s=n_ie(mu_e+mu_h)` Here`n_i=2.5xx10^19//m^3,e=1.6xx10^-19C,mu_e=0.36m^2//"volt"-SEC,mu_h=0.17m^2//"volt"-sec,sigma=2.5xx10^19xx1.6xx10^-19(0.36+0.17)=212S//m`.

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Mobilities of electrons and holes in a sample of intrinsic germanium at room temperature are 0.36m^2/ /"volt"-sec and 0.17m^2//"volt"-sec respectively. If the electrons and hole densities are each equal to 2.5xx10^19//m^3, calculate the conductivity.

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