MHT CET Physics question

Not in JEE Advanced syllabus

If a p-n junction diode is not connected to any circuit, then

(A)the potential is the same everywhere
(B)the p-type side has a higher potential than the n-type side
(C)there is an electric field at the junction directed from the n-side to p-sideCorrect
(D)there is an electric field at the junction directed from the p-type side to n-type side

Answer: (C)

Solution

Diffusion leaves negative ions on the p-side and positive ions on the n-side, creating a barrier potential with the n-side at higher potential and a field

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Question ID VK-074999