Question

Write the seven fundamental S.I units.

Answer 1

Hint: You should know that, S.I. system is a type of metric system which is used universally as a standard for measurements. There are some base quantities that are mutually independent on each other and all other quantities and units can be derived by applying various functions and formulas on the base units.

Complete step by step solution:
First of all, let us know about what fundamental units are.
So, fundamental units are the units of the fundamental quantities which are defined by the International System of Units (S.I. system) and these units are known as S.I. base units or S.I. fundamental units. S.I. units are considered as the building blocks of the system. These are generally independent of any other unit, and we can derive all other units from these units.
There are seven S.I. fundamental units. So, the seven units with their S.I. unit and symbol are as follows:
- The S.I. unit of length is meter (m).
- Kilogram (Kg) is the base unit of mass.
- The S.I. unit of time is second (s).
- The base unit of electric current is ampere (A).
- Kelvin (K) is the S.I. unit of thermodynamic.
- Mole (mol) is the fundamental unit of the amount of a substance.
- The fundamental unit of light is Candela (cd).

Note: Having a fundamental and standard unit of system is very much important because it helps to understand the measurements in a single set of unit systems internationally without having any confusion. It is important to note that, the fundamental units are mutually independent and hence they are also referred to as the base units, while the derived units are formed by different operations on the base units, hence termed as derived.