NEET UG 2020 · Physics · Question 180
NEET 2020 Physics, question 180
Question 180 of the NEET 2020 paper (code E1) is a Physics question from Semiconductor Electronics: Materials, Devices and Simple Circuits. Its idea, Combined Circuit Truth Tables, was asked 5 times, in 2017, 2020, 2022, 2023 and 2025, across NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q180 · Physics
For the logic circuit shown, the truth table is :
The figure, described in words
Logic circuit: inputs A and B each pass through a NOT gate; the two inverted outputs feed a NOR gate whose output is Y.
- 1A B Y 0 0 0 0 1 0 1 0 0 1 1 1Official answer
- 2A B Y 0 0 0 0 1 1 1 0 1 1 1 1
- 3A B Y 0 0 1 0 1 1 1 0 1 1 1 0
- 4A B Y 0 0 1 0 1 0 1 0 0 1 1 0
Official answer: option 1 · NTA final answer key
Same idea
Combined Circuit Truth Tables, in other papers
NEET asked this idea 5 times, in 2017, 2020, 2022, 2023 and 2025. The other 4 questions below.
- 2025 Q8The output (Y) of the given logic implementation is similar to the output of an/a _______ gate.Figure-based · Medium
- 2023 Q39For the following logic circuit, the truth table is:Figure-based · Easy
- 2022 Q45[Figure: logic circuit with inputs A, B and output C] The truth table for the given logic circuit is :Figure-based · Medium
- 2017 Q24The given electrical network is equivalent to :Figure-based · Easy
Combined Circuit Truth Tables: 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. Logic Gates alone had 10.