Fundamental Unit And Rules For Writing Symbols Of Unit

"The unit which are used for measuring fundamental quantities are called as fundamental units."

➡Fundamental quantity is nothing but any physical quantity which is independent of any other quantity is called fundamental quantity.

Example- length, mass, time, etc.

➡Fundamental unit is also called as Basic Unit.

➡Length, mass, time are called the basic unit or fundamental unit which are together called as the System of units.

Example: length - metre, mass - kilogram, time - second 

Rules for writing symbols of units:

➡1. The unit named after a scientist must be written in small letters when the complete name is written.

Example: Force unit should be written in newton not in Newton.

➡2. When only the first letter of the  scientist name is used as a symbol then it should written in  capital letter.

Example: Force unit should be written in J not j.

➡3. Other that scientist names, all the units are represented only by small letters.

➡4. Symbols for Units should only be written in singular form.

➡5. No full stop or punctuation marks should be written at the end of simple units.

Example: Mass of a body is 25 kg but not 25 kg.