SI Unit System
The General Conference on Weights and Measures created and recommended the SI in 1971 for use internationally in scientific, technical, industrial, and commercial activities. The SI has a common scheme of symbols, units, and abbreviations.
In order to eliminate unit misunderstanding in technical and scientific study, the SI unit is a global standard of measures. It is crucial to have a standard unit system because it makes it easier for people around the globe to comprehend measurements in a single set of unit systems.
The SI system has the following benefits:
1. This system uses a single unit for a single physical quantity, resulting in a rational unit system.
2.This system is a coherent system of units since all the derived units can be easily obtained from the basic and supplemental units.
3. Multiples and submultiples can be stated as powers of 10 as it is a metric system.
In SI, there are seven fundamental units as given in Table
| Base Quantity | SI Unit | SI Unit Symbol |
|---|---|---|
| Length (l) | Meter | m |
| Mass (M) | Kilogram | kg |
| Time (T) | Second | s |
| Electric current (I) | Ampere | A |
| Thermodynamic temperature (Θ)) | Kelvin | K |
| Amount of substance (N) | Mole | mol |
| Luminous intensity (J) | Candela | cd |