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A Ge specimen is dopped with Al. The con...

A `Ge` specimen is dopped with `Al`. The concentration of acceptor atoms is `~10^(21) at oms//m^(3)`. Given that the intrinsic concentration of electron hole pairs is `~10^(19)//m^(3)`, the concentration of electron in the speciman is

A

`10^(17)m^(-3)`

B

`10^(15)m^(-3)`

C

`10^(4)m^(-3)`

D

`10^(2)m^(-3)`

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The correct Answer is:
A
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