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Mobilities of electrons and holes in a s...

Mobilities of electrons and holes in a sample of intrinsic germanium at room temperature are `0.36 m^(2)//Vs` and `0.17 m^(2)//Vs`. The electron and hole densities are each equal to `2.5 xx 10^(19) m^(-3)`. The electrical conductivity of germanium is.

A

`0.47 S//m`

B

`5.18 S//m`

C

`2.12 S//m`

D

`1.09 S//m`

Text Solution

Verified by Experts

The correct Answer is:
C
`sigma =(1)/(rho)=e(mu_(e)n_(e)+mu_(h)n_(h))`.
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