The curve between charge density and distance | vedclass

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(A) In the depletion layer of a $P-N$ junction,there is a region of immobile ions. On the $N$-side of the junction,donor atoms lose electrons and beco

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(A) In the depletion layer of a $P-N$ junction,there is a region of immobile ions. On the $N$-side of the junction,donor atoms lose electrons and become positively charged ions. On the $P$-side of the junction,acceptor atoms gain electrons and become negatively charged ions. Thus,the charge density is negative on the $P$-side and positive on the $N$-side. The correct representation of this distribution is shown in the first option,where the charge density is negative for the $P$-region and positive for the $N$-region.

The curve between charge density and distance near a $P-N$ junction will be:

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