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Saturday, 31 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 9 January 2020, Shift 1, Physics Q19

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

If the screw on a screw-gauge is given six rotations, it moves by 3 mm on the main scale. If there are 50 divisions on the circular scale the least count of the screw gauge is :
  1. (1)0.010.01 cm
  2. (2)0.020.02 mm
  3. (3)0.0010.001 cmOfficial answer
  4. (4)0.0010.001 mm

Official answer

Option 3

NTA final key (Jan 2020).

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.