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(D) In a $PN$ junction,the depletion layer is formed by the diffusion of charge carriers. When the junction is reverse-biased,the width of the depleti

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Electric field is zero

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(D) In a $PN$ junction,the depletion layer is formed by the diffusion of charge carriers. When the junction is reverse-biased,the width of the depletion layer increases. The electric field in the depletion region is directed from the $N$-side to the $P$-side. At the exact center of the depletion layer,the electric field due to the $P$-side and $N$-side ions cancels out,resulting in a net electric field of zero.

In the middle of the depletion layer of a reverse-biased $PN$ junction,the

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