JEE Main · PhysicsEasy
In a forward biased p-n junction diode, the width of the depletion region
- A.Increases
- B.Decreases
- C.Remains constant
- D.Becomes zero
Show correct answer & step-by-step solution
Correct answer: B — Decreases
Solution
- In a p-n junction, a depletion region is formed by the built-in potential barrier that opposes the flow of charge carriers.
- When the diode is forward biased, an external voltage is applied that opposes this built-in potential.
- This external field pushes majority charge carriers toward the junction, which neutralizes the ions in the depletion region.
- As a result, the width of the depletion region decreases.
- Hence the answer is (B).
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