Base units : 

The unit associated with the base quantities is called Base Unit 

Or

The units which can't be derived from other units and are based on other Units are called Base units: (m, kg, s, A, K, cd, and mol )




Derived Units: 

SI Units that are derived from the base and supplementary units are called derived units.

Or

The units which are associated other than base and supplementary quantities eg: N, J, W, pa, C, etc.


Supplementary Unit:

Pure geometrical units (Radian and Steradian) were classified by the system international (SI) as supplementary units. But this designation was abrogated (nullified) in the 20th CGPM ( French: Conférence Générale des Poids et Mesures) abbreviated from General Conference on weight and measurement in 1995 and units were grouped as derived units.


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1. Website for School and College Level Physics   
2. Website for School and College Level Mathematics  
3. Website for Single National Curriculum Pakistan - All Subjects Notes 

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