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Measurements and Experimentation — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSMeasurements and Experimentation2 Marks
Question
What are the three requirements for selecting a unit of a physical quantity?
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Answer

The three requirements for selecting a unit of a physical quantity are
(1) It should be possible to define the unit without ambiguity.
(2) The unit should be reproducible.
(3) The value of units should not change with space and time.

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