NEET 2002 Physics question

Not in JEE Advanced syllabus

In a PN junction :

(1)High potential at N side and low potential at P sideCorrect
(2)High potential at P side and low potential at N side
(3)P and N both are at same potential
(4)Undetermined

Answer: (1)

Solution

When a p-n junction forms, electrons diffuse from n to p and holes from p to n. This leaves the n side with immobile positive donor ions and the p side with immobile negative acceptor ions, creating a built-in electric field (barrier potential) directed from n

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Question ID VK-088968