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PhysicsJEE Main 4 Apr 2026, Shift 1·Q1·MCQ·Easy–moderate

Units and Measurements · Significant figures & errors

In a screw gauge when the circular scale is given five complete rotations it moves linearly by 2.5 mm. If the circular scale has 100 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}

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