In the depletion region of a diode
a- There are no mobile charges
b-equal number of holes and electrons exist, making the region neutral
c-Recombination of holes and electrons has taken place
d-Immobile charged ions exist

Dear Student,

In the depletion region of a diode there are no mobile charges are present.
Depletion layer acts like a barrier that opposes the flow of electrons from n-side and holes from p-side. To overcome this barrier potential, we need to apply external voltage which is greater than this barrier potential.

correct option is (a).



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