Semiconductor Electronics for NEET: PYQ trend, NCERT lines NEET repeats, free lecture

Semiconductor Electronics in NEET: the numbers

102NEET / AIPMT questions in our PYQ bank (1988–2026)

37exam years with a question from this chapter

6NCERT lines NEET asked more than once

Topics NEET asks most

Topic	Questions
p-n junction and diode	34
Intrinsic and extrinsic semiconductors	28
Logic gates	23
Rectifiers and special diodes	17

NCERT lines NEET asked again and again

Read these lines from your NCERT book twice: NEET has built questions on each of them more than once.

Add a pentavalent atom (P, As, Sb) to Si or Ge and you get n-type, with electrons in the majority. A trivalent atom (B, Al, In) gives p-type , with holes in the majority.

AIPMT 2011NEET 2013NEET 2019NEET 2023

Reverse bias widens the depletion layer and raises the barrier, so only a tiny minority-carrier current flows. Forward bias narrows it and lets a large current pass.

AIPMT 2003AIPMT 2011NEET 2020

Carriers diffuse from the side of higher concentration, leaving fixed ions that form the depletion layer. The barrier potential depends on the material, doping and temperature.

AIPMT 1991NEET 2013NEET 2014

A Zener diode is heavily doped, has a narrow depletion layer and is used in reverse bias at its breakdown voltage, where the voltage stays almost constant. That makes it a voltage regulator.

NEET 2021NEET 2022NEET 2023

A half-wave rectifier gives output at the same frequency as the input, but a full-wave one gives twice the input frequency. A capacitor filter is what smooths the ripple.

AIPMT 2003NEET 2022NEET 2023

An OR gate followed by NOT is a NOR gate. A NAND gate with its two inputs joined acts as a NOT , and a NAND followed by that NOT gives AND .

NEET 2013NEET 2024

Free lecture by Prashant Sir

Semiconductors, Logic Gates & EM Wave | NEET Physics Crash Course |All Concepts, Tricks & PYQs · 54,067 views on YouTube

Free NCERT notes for Semiconductor Electronics

Semiconductors, doping, the p-n junction diode, rectifiers, Zener and optoelectronic diodes, and logic gates. NEET usually asks a couple of quick conceptual or short numerical questions from here, mostly on biasing, rectifier output, Zener circuits and gate truth tables.

Read the chapter notes: key NCERT points, graphs, every formula with its meaning, tricks, common mistakes and NEET traps.

FAQ

How many questions come from Semiconductor Electronics in NEET?

Our bank of NEET and AIPMT papers (1988–2026) has 102 questions from Semiconductor Electronics, most of them from p-n junction and diode, Intrinsic and extrinsic semiconductors, Logic gates.

Which NCERT line of Semiconductor Electronics has NEET asked the most?

This line has been asked 4 times in NEET/AIPMT: "Add a pentavalent atom (P, As, Sb) to Si or Ge and you get n-type, with electrons in the majority. A trivalent atom (B, Al, In) gives p-type, with holes in the majority."

Where can I study Semiconductor Electronics for NEET for free?

Prashant Sir's full lecture is free on the NEET Physics Kota YouTube channel, and the chapter notes are free on Dhruv.