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the no. densities of electrons and holes...

the no. densities of electrons and holes in a pure germanium at room temperature are equal and its value is `2×10^(16)`per `m^3` . On doping with aluminium the hole density increases to `3.5×10^(22)` per `m^3` then the electron density in dppoed germanium is

A

`1.1xx10^(10)m^(-3)`

B

`2.2xx10^(9)m^(-3)`

C

`3.3xx10^(9)m^(-3)`

D

`4.4xx10^(9)m^(-3)`

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TARGET PUBLICATION-SEMICONDUCTORS-EXERCISE
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  2. A wire of aluminum and a wire of germanium are cooled to a temperature...

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  8. the intrinsic semiconductors becomes an insulator at

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  9. a p -type semiconductor is (i) a silicon crystal doped with arsenic im...

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  10. when forward bias is appllied to as p-n junction . Then wat happens to...

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  11. a Ge specimen is doped with AI the concentartion of acceptor atoms is ...

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  15. the temoperature -coefficient of resistivity of semiconductors is

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  17. the no. densities of electrons and holes in a pure germanium at room t...

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  18. the circuit below represents a

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  19. The maximum wavelength which a photodiode can detect with Eg =0.74eV i...

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  20. When p-n junction is reverse biased, then the width of barriers potent...

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