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⚛️ Physics  ·  Units and Measurements  ·  NEET & JEE

If a measurement is repeated and gives values 9.8, 9.7, 9.9, 9.8, what is being assessed when these values are very close together?

Answer: Precision.

  • A Accuracy mainly
  • B Precision
  • C Dimensional consistency
  • D Significant figures mainly

Correct answer: B. Precision

Explanation: Values that are close to each other (regardless of whether they are close to the true value) demonstrate precision, the reproducibility of the measurement.

The 7 SI Base UnitsLengthmetre (m)fundamentalMasskilogram (kg)Timesecond (s)Electric Currentampere (A)Temperaturekelvin (K)Amount ofSubstancemole (mol)LuminousIntensitycandela (cd)Every other physical quantity is derived by combining powers of these 7 base units

The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.

Concept context

SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.

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