The term SI unit is the abbreviation of the French word Système International. SI or the International System of Units have been in existence since 1960. This has replaced the varying measurement units and has made it easier to express the units universally. SI unit, also called the metric system, is founded on seven SI base units for seven base quantities. Other quantities, called derived quantities, are derived from the SI Base units. These derived units are unlimited as they are formed by different operations on the base units.
The SI unit list of some of the important quantities in physics is given below.
THESE ARE SEVEN BASE UNITS IN THE SI SYSTEM
- meter (m) - length
- kilogram (kg) - mass
- second (s) - time
- kelvin (K) - temperature
- ampere (A) - electric current
- mole (mol) - amount of a substance
- candela (cd) - luminous intensity
THESE ARE SOME IMPORTANT DERIVED UNITS IN SI SYSTEM
- Force, Weight - Newton (N)
- Frequency - Hertz (Hz)
- Electric charge - Coulomb (C)
- Electric potential (Voltage) - Volt (V)
- Inductance - Henry (H)
- Capacitance - Farad (F)
- Resistance, Impedance, Reactance - Ohm (Ω)
- Electrical conductance - Siemens (S)
- Magnetic flux - Weber (Wb)
- Magnetic flux density - Tesla (T)
- Energy, Work, Heat - Joule (J)
- Power, Radiant flux - Watt (W)
- Angle - Radian (rad)
- Radioactivity - Becquerel (Bq)
- Luminous flux - Lumen (lm)
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