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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceDiagram basedHardData or graph

JEE Main 13 April 2023, Shift 1, Physics Q47

Question 47 of 90 in this shift, Physics question 17 of 30, Section A.

For the following circuit and given inputs A and B, choose the correct option for output 'Y'

The figure, in words

Circuit: input A goes to a rectangle-shaped (AND-type) gate feeding an OR-shaped gate with an output bubble (NOR-type); input B goes to a rectangle-shaped gate feeding an OR-shaped gate; the two outputs feed a NAND-shaped gate with output Y. Beside it are timing diagrams of inputs A and B (identical pulse trains against t1 to t6, each with low dips between t3-t4 and a drop to 0 at t5/t6 as printed). Options are timing diagrams of Y against t1 to t6.
  1. (1)[figure: timing diagram of Y over t1 to t6; Y low before t1, high from t1 to t6, low after t6]
  2. (2)[figure: timing diagram of Y over t1 to t6; Y low before t2, high from t2 to t6, low after t6]
  3. (3)[figure: timing diagram of Y over t1 to t6; Y high before t1, low between t1 and t2, high from t2 onwards]Official answer
  4. (4)[figure: timing diagram of Y over t1 to t6; Y low before t1, high between t1 and t2, low from t2 onwards]

Official answer

Option 3

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. 8 Apr 2023, Shift 1 · Q42For the logic circuit shown, the output waveform at Y is:MediumDiagram 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.