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p-n Junction Formation for NEET: 13 solved questions

Real NEET paper questions on p-n junction formation, part of semiconductor electronics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 1991 to 2026. No sign-in needed to read them.

What this topic asks

• Depletion region and barrier potential — 10 questions
• Diffusion and drift currents — 3 questions

All 13 questions with solutions

• Three identical p-n junction diodes D₁, D₂ and D₃ are connected across a battery as shown in the figure. If t… RE-NEET 2026
• The increase in the width of the depletion region in a p-n junction diode is due to NEET 2020
• The barrier potential of a p-n junction depends on (1) type of semiconductor material (2) amount of doping (3… NEET 2014
• In an unbiased p-n junction, holes diffuse from the p-region to the n-region because of NEET Karnataka 2013
• Application of a forward bias to a p-n junction NEET 2005
• Reverse bias applied to a junction diode CBSE AIPMT 2003
• Barrier potential of a p-n junction diode does not depend on CBSE AIPMT 2003
• In a p-n junction CBSE AIPMT 2002
• In forward bias, the width of potential barrier in a p-n junction diode CBSE AIPMT 1999
• Depletion layer consists of CBSE AIPMT 1999
• The cause of the potential barrier in a p-n junction diode is CBSE AIPMT 1998
• In the case of forward biasing of a p-n junction, which one of the figures correctly depicts the direction of… AIPMT 1995
• The depletion layer in the p-n junction region is caused by CBSE AIPMT 1991