Question

What are the fundamental units in S.I.?

Answer 1

1. The fundamental quantity is an independent physical quantity that is not possible to express in other physical quantities.
2. There are seven fundamental quantities and two supplementary ones i.e angle and solid angle.

Fundamental quantities, units and symbols in S.I. system are given below,

Quantity	Unit	Symbol
Length	metre	$m$
Mass	kilogram	$Kg$
Time	second	$s$
Temperature	kelvin	$K$
Luminous intensity	Candela	$cd$
Electric current	ampere	$A$
Amount of substance	mole	$mol$
Angle	radian	$rd$
Solid angle	Steradian	$st-rd$