In forward bias the width of potential barrier_____________?
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remains same
- D. No effect
Explanation
Forward bias opposes the built-in electric field of a p-n junction, reducing the depletion-layer width and lowering the potential barrier. Students often choose a because they confuse forward bias with increasing the electric field at the junction.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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