Measurement systems | System of Measurements

Topic: Measurement systems | System of Measurements

The basic fundamental Units in the system of measurements are Length, Time, Mass, Temperature etc. All the physical quantities can be expressed in terms of these fundamental units. The Different system of measurements can be used in different countries are discussed in the following video. If you like to read the full article scroll down below.

The different Measurement systems are

• Imperial System or F.P.S System

• Metric system or M.K.S System

• S.I System

Imperial System or F.P.S System

In the Imperial system, the system units for length is a yard, units of mass or weight or force in pounds, a unit of time in second and unit of temperature in degree Fahrenheit.

Metric System or M.K.S System

Metric system is the predominant system in the world. It is a decimal system of weight and measure. Units of length is a meter, Units of mass in a kilogram, Units of weight or force in kilogram-force, unit of temperature in degree centigrade. this system is simple for calculation purpose than the Imperial system.

S.I System

S.I means System International. It is more superior to all other systems. This system is extension and refinement of the Metric system. This system provides one basic unit for each physical quantity. it is comprehensive because its seven basic units cover all the disciplines. these seven basic units are

No.	Physical Quantity	Unit	Symbol
1	Length	meter	m
2	Time	second	s
3	Mass	kilogram	kg
4	Temperature	Kelvin	K
5	Electric Current	ampere	A
6	luminious intensity	candela	cd
7	Quantity of substance	mole	mol

Derived S.I Units

Units that are two or more quantities and which usually required a compound word to name them are called derived or compound units.

No.	Physical Quantity	Unit	Symbol
1	Force	Newton	N=kgm/s2
2	Work, Energy, Quantity of heat	Joule	J = Nm
3	Power	Watt	W = J/s
4	Electric charge	Coulomb	C = AS
5	Electric potential	Volt	V = W/A
6	Electric capacitance	Farad	F = C/V
7	Electric resistance	Ohm	Ω = V/A
8	Electric conductance	Siemen	S = A/V
9	Magnetic flux	Weber	Wb = V.S
10	Inductance	Henry	H = V.S./A
11	Luminous flux	Lumen	lm = cd.sr
12	Magnetic flux density	Tesla	T = Wb/m2
13	Illumination	Lux	Ix = lm/m3
14	Frequency	Hertz	Hz = cycles
15	Pressure	pascal	Pa = N/m2