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Saturday, 10 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedMediumDiagram reading

JEE Main 31 January 2024, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

The output of the given circuit diagram is -

The figure, in words

Logic circuit with inputs A and B. Top OR gate takes A and NOT B. Bottom OR gate takes B and NOT B (two branches from B). Outputs of both OR gates feed a NOR gate giving output Y.
  1. (1)[figure: truth table with columns A, B, Y; rows (A,B)->Y: 00->0, 10->1, 01->1, 11->0]
  2. (2)[figure: truth table with columns A, B, Y; rows (A,B)->Y: 00->0, 10->0, 01->0, 11->0]Official answer
  3. (3)[figure: truth table with columns A, B, Y; rows (A,B)->Y: 00->0, 10->0, 01->1, 11->0]
  4. (4)[figure: truth table with columns A, B, Y; rows (A,B)->Y: 00->0, 10->0, 01->0, 11->1]

Official answer

Option 2

NTA final key.

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Logic Gates
Idea tested
Combinational Logic Circuits

Same idea in other shifts

Asked 16× in all
  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. 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
  6. 3 Apr 2025, Shift 1 · Q45Choose the correct logic circuit for the given truth table having inputs A and B. Inputs A, B / Output Y: A=0,B=0: Y=0 A=0,B=1: Y=0…MediumDiagram basedHas a figure
  7. 3 Apr 2025, Shift 2 · Q45The truth table corresponding to the circuit given below is :EasyDiagram basedHas a figure
  8. 7 Apr 2025, Shift 2 · Q45Consider the following logic circuit. The output is Y=0Y=0 when :EasyDiagram 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.