Chapter 1 - Units of Measurements
Fundamental and Derived Units
The electronics industry follows the SI (System International) standard of units and measurements. There are seven fundamental units and two derived units. All measurements can be expressed as some combination of fundamental and/or derived units. The following tables shows the list of units.
NOTE: I don't recall ever using a Mole or a Steradian myself. But they're in the list in the interest of completeness.
Fundamental Units
| Quantity | Unit | Symbol |
|---|---|---|
| Length | Meter | m |
| Mass | Kilogram | kg |
| Time | Second | s |
| Electric Current | Ampere | A |
| Temperature | Kelvin | K |
| Luminous Intensity | Candela | cd |
| Amount of Substance | Mole | mol |
Derived Units
| Quantity | Unit | Symbol |
|---|---|---|
| Plane Angle | Radian | r |
| Solid Angle | Steradian | sr |
