What is System of Unit in Physics? and Its Types | New Topic [2024]

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Author Name: Arun Paul.

What is System of Unit in Physics?

A complete set of units, both fundamental and derived for all kinds of physical quantities is called system of units.

Types of System of Unit in Physics

There are four types of system –

  1. CGS system or Gaussian System: In this system the fundamental quantities are length, mass, and time and their respective units are taken as centimeters (cm), grams (g), and second (s).
  2. FPS System: In this system length, mass, and time are taken as fundamental quantities and their base units are foot (ft) pound (lb)and second (s) respectively.
  3. MKS System: It uses meter, kilogram, and second as the fundamental units of length, mass, and time respectively.
  4. SI units Or International System Of Units: The system of units, which is accepted internationally for measurement is the international system of units, abbreviated as SI, and is the modern form of metric system finally agreed upon at the eleventh International Conference of weights and measures, 1960.

Fundamental Quantities and Their Units

Below we have listed some basic or fundamental quantities and their SI Unit –

Fundamental QuantitiesSI UnitSymbol
1. Lengthmetrem
2. Masskilogramkg
3. Timesecs
4. Electric CurrentampereA
5. TemperaturekelvinK
6. Luminous Intensitycandelacd
7. Amount of Substancemolemol
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