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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 3 August 2021, Shift 1, Physics Q1

Question 1 of 90 in this shift, Physics question 1 of 30, Section A.

Least count corresponding to the main scale and circular scale of a screw gauge are 0.5 mm and 0.005 mm, respectively. A wire of diameter 2.675 mm is measured with the screw gauge. What would be the reading of divisions on circular scale of the screw gauge, if the zero error of the screw gauge is +0.02 mm ?
  1. (1)31
  2. (2)35
  3. (3)39Official answer
  4. (4)61

Official answer

Option 3

NTA final key.

Chapter
Units and Measurements
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.