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.
The different Measurement systems are
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 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
Quantity of substance
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.
|Work, Energy, Quantity of heat|
J = Nm
W = J/s
C = AS
V = W/A
F = C/V
Ω = V/A
S = A/V
Wb = V.S
H = V.S./A
lm = cd.sr
|Magnetic flux density|
T = Wb/m2
Ix = lm/m3
Hz = cycles
Pa = N/m2