MHT CET 2024 Physics question

Not in JEE Advanced syllabus

The potential barrier in p - n junction diode is due to

(A)depletion of positive charges near the junction
(B)accumulation of positive charges near the junction
(C)depletion of negative charges near the junction
(D)accumulation of positive and negative charges near the junctionCorrect

Answer: (D)

Solution

When a p-n junction forms, electrons diffuse from the n-side to the p-side and holes diffuse the other way. They recombine near the junction, leaving behind immobile positive donor ions on the n-side and immobile negative acceptor ions on the p-side. This layer of accumulated positive and negative (ionic) charges, the

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Question ID VK-092568