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Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 4 April 2026, Shift 1, Physics Q26

Question 26 of 75 in this shift, Physics question 1 of 25, Section A.

In a screw gauge when the circular scale is given five complete rotations it moves linearly by 2.52.5 mm. If the circular scale has 100100 divisions, the least count of screw gauge is ______ mm.
  1. (1)1×10−21\times10^{-2}
  2. (2)1×10−31\times10^{-3}
  3. (3)5×10−25\times10^{-2}
  4. (4)5×10−35\times10^{-3}Official answer

Official answer

Option 4

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 42 of the 174 JEE Main shifts held from 2017 to 2026.