What is Physical Quantities: Physical Quantities Definition

 

Physical Quantities:

                            All the quantities that can be measured are called physical Quantities'.

                    In Physics we study only those quantities which can be defined and measured. Quantities like length, mass, time, density, and temperature can be measured therefore they are called physical quantities.

                   For example, the length of a book can be measured, and the duration of our stay at school is measurable, hence these are physical quantities. Physical quantities are classified into two categories:  

Base quantities:

                        A minimum number of physical quantities selected and their units are defined and standardized such that in terms of these all other physical quantities that can be expressed are called base quantities. The corresponding units for these quantities are called base units.

Derived quantities:

                          The physical quantities defined in terms of base quantities are called derived quantities. The corresponding units for these quantities are called derived units.