MHT CET 2025 Physics question

Not in JEE Advanced syllabus

Applying forward bias to p-n junction, the potential barrier

(A)increases
(B)decreasesCorrect
(C)remains unchanged
(D)becomes zero

Answer: (B)

Solution

In forward bias the external battery's positive terminal is connected to the p-side and the negative terminal to the n-side. The applied voltage opposes the built-in barrier potential, so the barrier height decreases, the depletion layer narrows and the majority carriers cross

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Question ID VK-103076