Unit of electric potential: volt (V) The volt is the potential difference between two points of a conducting wire carrying a constant current of 1 ampere, when the power dissipated between these points is equal to 1 watt. Unit of electric resistance: ohm (Ω) The ohm is the el...
Noun1.SI unit- a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the Unit...
能量单位：焦耳 符号J 电能单位：焦耳（J）或者“千瓦.时（kw.h）”或者“度” 1kw.h=1度
SI Base UnitBase Quantity Name SymbolLength Meter mMass Kilogram kgTime Second sElectric current Ampere ATemperature Kelvin KAmount of substance Mole molLuminous intensity Candela cdTABLE D.2 Some Derived SI UnitsExpression in Expression inTerms of Base Terms of OtherQuantity Name Symbol Units SI ...
Ampere (A)Unit of electric current. The value of the ampere is now based on the elementary charge, which is 1/1.602176634 × 10-19times the elementary chargeeper second. Prior to 2018, the ampere was based on the force between two current carrying conductors that fixed the value of vacuum...
‘A’ symbolises an ampere, the SI unit of electric current. ‘K’ is the symbol of kelvin, which is the SI unit of thermodynamic temperature. ‘mol’ is the symbol of mole, which is the SI unit of the amount of substance.
国际单位制(SI)InternationalSystemofUnitsSI基本单位共有7个,它们彼此独立,是构成SI的基础。它们的名称和符号见下表。SI基本单位SIBaseUnits量的名称(Quantity)单位名称(Name)单位符号(Symbol)长度(length)米(meter)m质量(mass)千克(公斤)(kilogram)kg时间(time)秒(second)s电流(electriccurrent)安培(ampere)A热力学...
INTERNATIONAL SYSTEM OF UNITS (SI)
Electric current Ampere (A) The ampere can be defined as a measure of the amount of electric charge that passes a point in an electric circuit per unit time (6.241x 1018 electrons). Thermodynamic temperature Kelvin (K) The kelvin so far known as the unit of Thermodynamic temperature scale....
electric current ampere A temperature kelvin K amount of substance mole mol luminous intensity candela cd The derived units can be formed by combining the base units according to the algebraic relations linking the corresponding quantities, for instance the SI coherent derived unit for density (mass ...