Question

What are SI units? Name the fundamental SI units.

Answer 1

SI Units :

In 1960, the general conference of weights and measures proposed revised metric system, called International system of Units i.e. SI system (abbreviated from its French name).

The seven fundamental SI units are as given below :

No.	Base physical quantity	SI unit	Symbol
i.	Length	Metre	k
ii.	Mass	Kilogram	kg
iii.	Time	Second	s
iv.	Temperature	Kelvin	K
v.	Amount of substance	Mole	mol
vi.	Electric current	Ampere	A
vii.	Luminous intensity	Candela	cd

[Note : Units for other quantities such as speed, volume, density, etc. can be derived from fundamental SI units.]