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JEE Main 2023 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 13 April 2023, Shift 2, Physics Q49

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

The output from a NAND gate having inputs A and B given below will be,

The figure, in words

Input timing diagram over 6 equal intervals (7 dashed vertical lines). A: 1 before first line, 0 from line 1 to line 3, 1 from line 3 to line 5, 0 from line 5 to line 7. B: 1 before first line, 0 (line 1-2), 1 (2-3), 0 (3-4), 1 (4-5), 0 (5-6), 1 (6-7). Options are four output square-wave diagrams.
  1. (1)[figure: output square wave over 6 intervals - low initially; high in interval 1; low in intervals 2-3; high in intervals 4-5; low in interval 6]
  2. (2)[figure: output square wave over 6 intervals - low initially; high in intervals 1-3; low in interval 4; high in intervals 5-6]Official answer
  3. (3)[figure: output square wave over 6 intervals - low initially; high in interval 1; low in interval 2; high in intervals 3-4; low in interval 5; high in interval 6]
  4. (4)[figure: output square wave over 6 intervals - high initially; low in intervals 1-2; high in intervals 3-4; low in interval 5; high in interval 6]

Official answer

Option 2

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Logic Gates
Idea tested
Universal Gates NAND and NOR

Same topic in other shifts

All Logic Gates questions
  1. 2 Apr 2026, Shift 2 · Q30If X and Y are the inputs, the given circuit works asMediumDiagram basedHas a figure
  2. 4 Apr 2026, Shift 1 · Q38Two 44 bits binary numbers, A=1101A=1101 and B=1010B=1010 are given in the inputs of a logic circuit shown in figure below. The output (YY) will…EasyDiagram basedHas a figure
  3. 5 Apr 2026, Shift 1 · Q45For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow?EasyDiagram basedHas a figure
  4. 6 Apr 2026, Shift 2 · Q43Refer to the logic circuit given below. For two inputs (A=1A=1, B=1B=1) and (A=0A=0, B=1B=1), output (YY) will be __________.EasyDiagram basedHas a figure
  5. 8 Apr 2026, Shift 2 · Q45The output YY for the given inputs AA and BB to the circuit is :MediumDiagram basedHas a figure
  6. 2 Apr 2025, Shift 2 · Q39In the digital circuit shown in the figure, for the given inputs the P and Q values are :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 42 of the 174 JEE Main shifts held from 2017 to 2026.