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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 8 April 2023, Shift 1, Physics Q42

Question 42 of 90 in this shift, Physics question 12 of 30, Section A.

For the logic circuit shown, the output waveform at Y is:

The figure, in words

Input waveforms: A is 0 until t=2, then high (1) from t=2 to 4; B is 0 until t=1, high from 1 to 2, 0 from 2 to 3, high from 3 to 4. Circuit: A goes into a NAND gate (single input), B goes into another NAND gate (single input); the outputs of these two gates feed a third NAND gate whose output is Y.
  1. (1)[figure: waveform, low (0) until t=1, then high from t=1 onwards through t=4]Official answer
  2. (2)[figure: waveform, high from t=0 to t=1, then low (0) from t=1 to t=4]
  3. (3)[figure: waveform, constant high from t=0 to t=4]
  4. (4)[figure: waveform, constant 0 from t=0 to t=4]

Official answer

Option 1

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Logic Gates
Idea tested
Timing Diagrams and Waveform Analysis

Same idea in other shifts

Asked 7× in all
  1. 8 Apr 2026, Shift 2 · Q45The output YY for the given inputs AA and BB to the circuit is :MediumDiagram basedHas a figure
  2. 13 Apr 2023, Shift 1 · Q47For the following circuit and given inputs A and B, choose the correct option for output 'Y'HardDiagram basedHas a figure
  3. 27 Jul 2022, Shift 1 · Q49A logic gate circuit has two inputs A and B and output Y. The voltage waveforms of A, B and Y are shown below. The logic gate circuit is:EasyDiagram basedHas a figure
  4. 27 Jun 2022, Shift 1 · Q49Identify the correct Logic Gate for the following output (Y) of two inputs A and B.MediumDiagram basedHas a figure
  5. 3 Aug 2021, Shift 1 · Q20In the given figure, a logic circuit has the input waveforms `A' and `B'. The correct output waveform will be -MediumDiagram basedHas a figure
  6. 26 Feb 2021, Shift 2 · Q4Draw the output signal Y in the given combination of gates.MediumDiagram basedHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.