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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedEasyDiagram reading

JEE Main 27 July 2022, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

A 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:

The figure, in words

Three square-wave voltage waveforms against time, stacked one above the other and labelled A, B and Y (each on its own vertical axis). A: starts low, then alternating high and low square pulses (three high pulses in all). B: one wide high pulse, then low, then one narrower high pulse near the end. Y: one high pulse at the start, then low for a longer interval, then one high pulse near the end. No values or other labels are printed.
  1. (1)AND gateOfficial answer
  2. (2)OR gate
  3. (3)NOR gate
  4. (4)NAND gate

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. 8 Apr 2023, Shift 1 · Q42For the logic circuit shown, the output waveform at Y is:MediumDiagram basedHas a figure
  3. 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
  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.