The Fundamental Quantity is independent Physical Quantity that is not possible to express in other Physical Quanitity. It is used as pillars for other quantities aka Derived Quantities. In Physics, Length, Mass, Time, Electric Current, Thermodynamic Temperature, etc are examples of Fundamental Quantities.
Area =m2 Volume =m3 Force =kgm/s2 Pressure =kg/(ms2) Density =kg/m3" The seven fundamental S.I units are:− metre → for length second → for time kilogram → for mass kelvin → for temperature ampere → for electric current candela → for luminous intensity mole → for the amount of substance.
Some commonly used derived units
A derived unit is a SI unit of measurement comprised of a combination of the seven base units. Like SI unit of force is the derived unit, newton or N where N=s21×m×kg. There are some commonly used derived units which includes:
1. Pressure = AreaForce=m2N
2. Mass density= m3kg
3. Specific volume = kgm3
4. Current density = meter2Ampere=m2A
5. Magnetic field strength = MeterAmpere=mA
6. Capacitance =Farad=F=VC=m−2kg−1s4A2
Identify and give examples of some derived units
The units of all quantities other than fundamental units is called derived unit. Derived units are obtained in terms of fundamental quantities.