Q. 36

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Answer :

i) Each arsenic atom will provide on electron. Hence, density of electrons will be

We also know that

So density of holes in this side will be,

When boron is added to the other side then each atom will contribute to one hole. So, density of holes will be,

Now the concentration of electrons will be,

ii) Density of holes in n region is

Density of electron in p region is

So, holes in n region will contribute more to the reverse saturation current.

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