NEET UG · Physics · Semiconductor Electronics: Materials, Devices and Simple Circuits
Logic Gates: NEET previous year questions
10 questions in ten years of NEET, in 9 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.
- Asked in 10 years
- 10
- about 0.9 per paper
- Years asked
- 9/10
- last asked 2025
- Weighted estimate
- 0.9
- model; history: 1.0 a paper on average, typically 1
Key findings
- 01
Asked in 9 of 10 papers, 10 questions in all: #80 of 204 topics by ten-year total. Last asked in 2025.
- 02
56% of its questions since 2018 tested an idea never asked before; 1 repeated an idea from the year before.
- 03
The most repeated idea is Combined Circuit Truth Tables, asked 5 times (2017, 2020, 2022, 2023, 2025), usually as “truth table of combined gate circuit”.
- 04
NEET has asked 6 of the 85 ideas in this topic; 73 have never been asked, directly or indirectly.
- 05
Mostly asked as figure-based (90%); 50% easy, 0% hard.
Questions per year
- Up to 2023
- 1.0
- per paper
- Since 2024
- 0.9
- -0.0
- Usual gap
- 1.0 yrs
- between papers asking it
- Swing
- ±0.4
- questions, year to year
How it is asked
Difficulty, format and skill
Across all 10 questions on Logic Gates since 2017.
Difficulty
QUESTIONS- Easy5 · 50%
- Medium5 · 50%
- Hard0 · 0%
Format
SHARE- Figure-based · 9 Q90%
- One-line MCQ · 1 Q10%
Skill tested
SHARE- Application · 5 Q50%
- Figure reading · 3 Q30%
- Multi-step · 1 Q10%
- Data or graph · 1 Q10%
Repeats
New idea, or one asked before?
Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.
- Idea asked for the first time
- Idea asked in an earlier paper
Coverage of the topic
NEET has asked 6 of the 85 ideas in this topic. 73 have never been asked yet.
- Asked directly6 · 7%
- Touched inside another question6 · 7%
- Never asked73 · 86%
Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.
Drill down
Idea, year, question
Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.
- Repeated5 · 50%
- 2025 · Q8The output (Y) of the given logic implementation is similar to the output of an/a _______ gate.
mediumFigure-based
- 2023 · Q39For the following logic circuit, the truth table is:
easyFigure-basedAsked the year before
- 2022 · Q45[Figure: logic circuit with inputs A, B and output C] The truth table for the given logic circuit is :
mediumFigure-based
- 2020 · Q180For the logic circuit shown, the truth table is :
easyFigure-based
- 2017 · Q24The given electrical network is equivalent to :
easyFigure-basedNew idea
- 2025 · Q8
- 1 · 10%
- 1 · 10%
- 1 · 10%
- 1 · 10%
- 1 · 10%
Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.
Ideas
Every idea inside this topic
6 different ideas were tested; 1 came more than once. Boolean Algebra Expressions is the foundation for 20 other ideas in the syllabus.
- Combined Circuit Truth Tables5×
truth table of combined gate circuit
Figure-based · 11% next · foundation for 1 - Boolean Algebra Expressions1×
boolean expression from truth table
One-line MCQ · 6% next · foundation for 20 - NAND to NOT Conversion1×
truth table of combined gate circuit
Figure-based · 6% next · foundation for 1 - Logic Gate Waveform Analysis1×
output waveform of combined gate circuit
Figure-based · 4% next - Electrical Switch Circuit Analogies1×
identify gate from switch circuit
Figure-based · 4% next · foundation for 1 - XOR Gate Fundamentals1×
output expression of combined gate circuit
Figure-based · 4% next · foundation for 19
Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas
Every question
Logic Gates questions, year by year
The opening words of each question as it appeared in the official paper, with the idea it tested.
NEET 20251 question
- Q8The output (Y) of the given logic implementation is similar to the output of an/a _______ gate.
Idea: Combined Circuit Truth Tables
MediumFigure-based · figure
NEET 20242 questions
- Q15The output () of the given logic gate is similar to the output of an/a :
Idea: NAND to NOT Conversion
New ideaMediumFigure-based · figure - Q33A logic circuit provides the output as per the following truth table A | B | Y 0 | 0 | 1 0 | 1 | 0 1 | 0 | 1 1 | 1 | 0 The expression…
Idea: Boolean Algebra Expressions
New ideaEasyOne-line MCQ · figure
NEET 20231 question
- Q39For the following logic circuit, the truth table is:
Idea: Combined Circuit Truth Tables
Asked last yearEasyFigure-based · figure
NEET 20221 question
- Q45[Figure: logic circuit with inputs A, B and output C] The truth table for the given logic circuit is :
Idea: Combined Circuit Truth Tables
MediumFigure-based · figure
NEET 20211 question
- Q46For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal ?
Idea: Logic Gate Waveform Analysis
New ideaMediumFigure-based · figure
NEET 20201 question
- Q180For the logic circuit shown, the truth table is :
Idea: Combined Circuit Truth Tables
EasyFigure-based · figure
NEET 20191 question
- Q39[Circuit diagram: switches A and B with LED (Y)] The correct Boolean operation represented by the circuit diagram drawn is :
Idea: Electrical Switch Circuit Analogies
New ideaMediumFigure-based · figure
NEET 20181 question
- Q17In the combination of the following gates the output Y can be written in terms of inputs A and B as
Idea: XOR Gate Fundamentals
New ideaEasyFigure-based · figure
NEET 20171 question
- Q24The given electrical network is equivalent to :
Idea: Combined Circuit Truth Tables
EasyFigure-based · figure
Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.