explain fundamental unit and independent unit
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fundemental unit- each of a set of unrelated units of measurement, which are arbitrarily defined and from which other units are derived. For example, in the SI system the fundamental units are the metre, kilogram, and second
independent units measurment- The SI base units and their physical quantities are the metre for measurment of length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the candela for luminous intensity, and the mole for amount of substance
independent units measurment- The SI base units and their physical quantities are the metre for measurment of length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the candela for luminous intensity, and the mole for amount of substance
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Fundamental Units :
The units selected for measuring mass, length and time are called as Fundamental units.
1.The fundamental units are not defined in terms of other quantities. For this reason they are called as Base or fundamental quantities.
2.The units of these three fundamental are independent of each other.Units of physical quantites can be expressed in terms of fundamental units and are called as Derived units.
Old system of Fundamental units
:C.G.S (centimeter --unit of length, Gram ---unit of mass , seconds--unit of time)
M.K.S (Meter -- unit of length , Kilogram --- unit of mass, Second-- unit of time)
New system:
SI units (systeme International ) was introduced in 1960 and have been accepted by all countries for scientific work.
The seven basic quantities under SI units are :-
-->mass
--->length
--->time
--->electric current
---->temperature
---->luminous quantity
--->quantity of matter
The units selected for measuring mass, length and time are called as Fundamental units.
1.The fundamental units are not defined in terms of other quantities. For this reason they are called as Base or fundamental quantities.
2.The units of these three fundamental are independent of each other.Units of physical quantites can be expressed in terms of fundamental units and are called as Derived units.
Old system of Fundamental units
:C.G.S (centimeter --unit of length, Gram ---unit of mass , seconds--unit of time)
M.K.S (Meter -- unit of length , Kilogram --- unit of mass, Second-- unit of time)
New system:
SI units (systeme International ) was introduced in 1960 and have been accepted by all countries for scientific work.
The seven basic quantities under SI units are :-
-->mass
--->length
--->time
--->electric current
---->temperature
---->luminous quantity
--->quantity of matter
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