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The electron mobility in N-type germaniu...

The electron mobility in `N`-type germanium is `3900cm^(2)//v-s` and its conductivity is `6.24 mho//cm`, then impurity concentration will be if the effect of cotters is negligible

A

`10^(15)cm^(3)`

B

`10^(13)cm^(3)`

C

`10^(12)//cm^(3)`

D

`10^(16)//cm^(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`sigma-=en_(e)mu_(e)rArr n_(e)=(sigma)/(emu_(e))`
`=(6.24)/(1.6xx10^(-19)xx3900)=10^(16)//cm^(3)`
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