MHT CET Physics question

Not in JEE Advanced syllabus

In a p-n junction diode, if the junction current is zero, it means that

(A)the potential barrier has disappeared altogether
(B)there are no carriers crossing the junction from one end to another
(C)number of majority carriers and minority carriers crossing the junction are equalCorrect
(D)number of majority carriers exceed the minority carriers closing the junction

Answer: (C)

Solution

Zero net current means the diffusion current of majority carriers is exactly cancelled by the opposite drift current of minority carriers, so equal numbers cross the junction in the two directions;

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Question ID VK-085185