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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceDiagram basedMediumDiagram reading

JEE Main 4 September 2020, Shift 2, Physics Q19

Question 19 of 75 in this shift, Physics question 19 of 25.

Identify the operation performed by the circuit given below :

The figure, in words

Three input terminals labelled A, B, C (each a dot). Each input line enters a small rectangle drawn against the back of its own gate symbol, so the one line reaches both input points of that gate; each of these three gate symbols has a concave curved back, curved sides meeting at a pointed front, and a small circle at the output. The three outputs are joined by lines to the three inputs of a fourth gate symbol of the same shape (concave curved back, pointed front, small circle at the output), whose output goes to a terminal dot on the right.
  1. (1)NOT
  2. (2)ANDOfficial answer
  3. (3)OR
  4. (4)NAND

Official answer

Option 2

NTA final key (Sep 2020).

Chapter
Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic
Logic Gates
Idea tested
Gate Realization using Universal

Same idea in other shifts

Asked 2× in all
  1. 11 Apr 2023, Shift 1 · Q32The logic performed by the circuit shown in figure is equivalent to :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 108 of the 174 JEE Main shifts held from 2017 to 2026.