Fundamental and Derived Units

Physics

definition

Identification of fundamental quantities

A fundamental unit is a unit adopted for measurement of a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no subset quantity can be expressed in terms of the others.

  1. Length (meter)
  2. Mass (kilogram)
  3. Time (second)
  4. Electric current (ampere)
  5. Thermodynamic temperature (kelvin)
  6. Amount of substance (mole)
  7. Luminous intensity (candela)