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JEE Main 2026 Jan 28 Shift 2, Physics Q7: Measurements

JEE Main2026Jan 28, Shift 2Physics
Q.

In an experiment, a set of reading are obtained mm, mm, mm, mm. The expected least count of the instrument used in recording these readings is ____ mm.

  1. A

    0.01

  2. B

    0.001

  3. C

    0.1

  4. D

    0.05

Solution

The smallest digit that varies between the readings is the hundredths place (0.01 mm). So the instrument resolves to 0.01 mm. Least count = 0.01 mm.

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