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PhysicsJEE Main 28 Jan 2026, Shift 2·Q7·MCQ·Easy

Units and Measurements · Significant figures & errors

In an experiment, a set of readings are obtained 1.24 mm, 1.25 mm, 1.23 mm, 1.21 mm. The expected least count of the instrument used in recording these readings is mm.
  1. (1)0.01
  2. (2)0.001
  3. (3)0.1
  4. (4)0.05
We corrected a printing error in the original paper

Source printed “a set of reading are obtained −1.24-1.24 mm” (stray minus sign on the first reading).

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