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Suppose a pure Si crystal has 5 × 10^(28...

Suppose a pure Si crystal has `5 × 10^(28)` atoms `m^(–3)`. It is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that `n_(i) =1.5 × 10^(16) m^(–3)`.

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Here `n_(e) ~~ N_(D)=((5 xx10^(28))/(10^(6)))=5 xx 10^(22)m^(-3),n_(h)=(n_(1)^(2))/(n_(e))=((1.5 xx 10^(16))^(2))/(5xx10^(22))=(2.25 xx 10^(32))/(5 xx10^(22))=4.5 xx 10^(9) m^(3)`.
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ALLEN-SEMICONDUCTORS-Part-3(Exercise-4)
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  15. If a full wave rectifier circuit is operating from 50 Hz mains, the fu...

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  16. In a common-base of mode of transistor, the collector current is 5.488...

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  17. A solid which is not transperent to visible light and whose conductivi...

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  18. If the ratio of the concentration of electrons and that of holes in a ...

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  20. In the following, which one of the diodes is reverse biased ?

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