Units

Units :

          The Chosen standard used for measuring a physical quantity is called unit.

          Unit should be :

·        Well defined,

·        Easy to reproduce,

·        Easy to compare,

·        Internationally accepted,

·        Independent of changes in physical conditions

Units are two types :

·        Fundamental unit, and

·        Derived unit.

System of Units :

          Units depend on choice of units leads to a new system (set) of units. The internationally accepted systems are :

·        CGS system,

·        MKS system,

·        FPS system,

·        SI units.