Physics describes the laws of nature. This description is quantitative and involves measurement and comparison of physical quantities. To measure a physical quantity we need some standard unit of that quantity.
We can define a set of fundamental
quantities as follows :
(a) The fundamental quantities should be independent of each other, and
(b) All other quantities may be expressed in terms
of the fundamental quantities.
Quantity | Name of unit | symbol |
Mass | kilogram | k |
Length | metre | m |
Time | second | s |
Current | ampere | A |
Amount of substance | mole | mol |
Temperature | Kelvin | K |
Intensity | candela | cd |
0 Comments