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Question

In the depletion layer of p-n junction diode, these are presents.

A
Only holes
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B
Only electrons
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C
Electrons and holes both
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D
Neither electron nor hole
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Solution

The correct option is C Electrons and holes both
When p-type and semiconductor are joined, the electrons in n type diffuse into the p-type across the junction whereas holes in p-type diffuse into the n-type across the junction to form a depletion layer. Thus in the depletion layer of p-n junction diode, both electrons as well as holes are present.

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