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Electrical conductivies of Ge and Na are...

Electrical conductivies of Ge and Na are `sigma_(1)` and `sigma_(2)` respectively. If these substances are heard, then

A

`sigma_(1)` decreases and `sigma_(2)` increases

B

both `sigma_(1)` and `sigma_(2)` decreases

C

both `sigma_(1)` and `sigma_(2)` increases

D

`sigma_(1)` increases and `sigma_(2)` decreases

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The correct Answer is:
D
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-2)
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  13. In sample of pure silicon 10^(13) "atom"//cm^(3) is mixed of phosphoru...

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  14. Mobility of electron in N-type Ge is 5000 cm^(2)//"volt" sec and condu...

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  15. A diode made forward biased by a two volt battery however there is a d...

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