COMEDK · Physics · 30. Semiconductors
In a PN junction diode, the forward bias is increased gradually from 0 Volt to 1 Volt. Which of the following statements is correct?
- A The depletion width increases, and barrier potential increases
- B The depletion width decreases, but the electric field inside the junction increases
- C The depletion width remains unchanged, but current increases
- D The depletion width decreases and barrier potential decreases
Answer & Solution
Correct Answer
(D) The depletion width decreases and barrier potential decreases
Step-by-step Solution
Detailed explanation
In a PN junction diode, the built-in potential (barrier potential) acts from the n-side to the p-side. When the diode is forward biased, the applied voltage opposes the built-in potential. The effective barrier potential becomes \(V_0 - V_f\), where \(V_0\) is the built-in…
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