NEET UG 2026 · Physics · Question 42
NEET 2026 Physics, question 42
Question 42 of the NEET 2026 paper (re-exam) is a Physics question from Semiconductor Electronics: Materials, Devices and Simple Circuits. Its idea, p-n Junction: Depletion Region and Biasing, was asked 4 times, in 2017, 2020, 2022 and 2026, across NEET 2017–2026. The NTA final answer key gives option 3.
Updated 2026-10-08
Q42 · Physics
Three identical p-n junction diodes , and are connected across a battery as shown in the figure. If the width of the depletion regions of , and are , and , respectively, then the correct option is :
The figure, described in words
Three parallel branches across a 5 V battery, each with a 1 kOhm resistor: D1 forward biased; D2 forward oriented but its branch is open (gap in wire); D3 reverse biased.
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- 3Official answer
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Official answer: option 3 · NTA final answer key
Same idea
p-n Junction: Depletion Region and Biasing, in other papers
NEET asked this idea 4 times, in 2017, 2020, 2022 and 2026. The other 3 questions below.
- 2022 Q23[Figure: circuits (a), (b), (c)] In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in :Figure-based · Medium
- 2020 Q153The increase in the width of the depletion region in a p-n junction diode is due to :One-line MCQ · Easy
- 2017 Q22Which one of the following represents forward bias diode ?Figure-based · Easy
p-n Junction: Depletion Region and Biasing: every question and how it was framed
The chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits in ten years of NEET
27 questions from 2017–2026, asked in 10 of 10 papers, about 2.6 a paper. Semiconductor Devices alone had 17.