Fundamental and Derived Units

Fundamental Units are independent to each other and these units are mainly used to measure the units of the fundamental physical quantities. There are seven fundamental units available namely – meter, kilogram, second, ampere, kelvin, candela and mole.

Derived Units are the units which are obtained from the fundamental units. Except fundamental units, all other units are known as Derived Units. The examples of Derived units are units of area, volume, momentum, speed, velocity, density, force, energy, work etc.

Fundamental Units

Fundamental units are also known as base units. There are total of 7 base units. Fundamental units and their Symbols in SI system are discussed in the following table:

Physical Quantity	Name of Unit	Symbol
Length	meter	m
Mass	kilogram	kg
Time	second	s
Electric current	ampere	A
Thermodynamic temperature	kelvin	K
Amount of substance	mole	mol
Luminous intensity	candela	cd

Units and Dimensions

Units and Dimensions is a fundamental and essential topic in Physics. For the measurement of a physical quantity, Unit plays a vital role. Unit provides a complete idea about the measurement of a physical quantity. Dimension is a measure of the size or extent of a particular quantity.

In this article, we will learn Units and Dimensions related all details including definition, fundamental and derived units, system of units, List of Units of physical quantities, Dimension formula, List of physical quantities and their dimensions, etc.

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