name='google-site-verification'/> Marine Engineering 360: Electrical & Electronic Units

Thursday, June 30, 2016

Electrical & Electronic Units


Electrical & electronic units table

Unit NameUnit SymbolQuantity
Ampere (amp)AElectric current (I)
VoltVVoltage (V, E)
Electromotive force (E)
Potential difference (Δφ)
OhmΩResistance (R)
WattWElectric power (P)
Decibel-milliwattdBmElectric power (P)
Decibel-WattdBWElectric power (P)
Volt-Ampere-ReactivevarReactive power (Q)
Volt-AmpereVAApparent power (S)
FaradFCapacitance (C)
HenryHInductance (L)
siemens / mhoSConductance (G)
Admittance (Y)
CoulombCElectric charge (Q)
Ampere-hourAhElectric charge (Q)
JouleJEnergy (E)
Kilowatt-hourkWhEnergy (E)
Electron-volteVEnergy (E)
Ohm-meterΩ∙mResistivity (ρ)
siemens per meterS/mConductivity (σ)
Volts per meterV/mElectric field (E)
Newtons per coulombN/CElectric field (E)
Volt-meterV·mElectric flux (Φe)
TeslaTMagnetic field (B)
GaussGMagnetic field (B)
WeberWbMagnetic flux (Φm)
HertzHzFrequency (f)
SecondssTime (t)
Meter / metremLength (l)
Square-meterm2Area (A)
DecibeldB 
Parts per millionppm 

Units prefix table

Prefix

Prefix
Symbol
Prefix
factor
Example
picop10-121pF = 10-12F
nanon10-91nF = 10-9F
microμ10-61μA = 10-6A
millim10-31mA = 10-3A
kilok10 31kΩ = 1000Ω
megaM10 61MHz = 106Hz
gigaG10 91GHz = 109Hz


Electrical units definitions

Volt (V)

Volt is the electrical unit of voltage.
One volt is the energy of 1 joule that is consumed when electric charge of 1 coulomb flows in the circuit.
1V = 1J / 1C

Ampere (A)

Ampere is the electrical unit of electrical current. It measures the amount of electrical charge that flows in an electrical circuit per 1 second.
1A = 1C / 1s

Ohm (Ω)

Ohm is the electrical unit of resistance.
1Ω = 1V / 1A

Watt (W)

Watt is the electrical unit of electric power. It measures the rate of consumed energy.
1W = 1J / 1s
1W = 1V · 1A

Decibel-milliwatt (dBm)

Decibel-milliwatt or dBm is a unit of electric power, measured with logarithmic scale referenced to 1mW.
10dBm = 10 · log10(10mW / 1mW)

Decibel-Watt (dBW)

Decibel-watt or dBW is a unit of electric power, measured with logarithmic scale referenced to 1W.
10dBW = 10 · log10(10W / 1W)

Farad (F)

Farad is the unit of capacitance. It represents the amount of electric charge in coulombs that is stored per 1 volt.
1F = 1C / 1V

Henry (H)

Henry is the unit of inductance.
1H = 1Wb / 1A

siemens (S)

siemens is the unit of conductance, which is the opposite of resistance.
1S = 1 / 1Ω

Coulomb (C)

Coulomb is the unit of electric charge.
1C = 6.238792×1018 electron charges

Ampere-hour (Ah)

Ampere-hour is a unit of electric charge.
One ampere-hour is the electric charge that flow in electrical circuit, when a current of 1 ampere is applied for 1 hour.
1Ah = 1A · 1hour
One ampere-hour is equal to 3600 coulombs.
1Ah = 3600C

Tesla (T)

Tesla is the unit of magnetic field.
1T = 1Wb / 1m2

Weber (Wb)

Weber is the unit of magnetic flux.
1Wb = 1V · 1s

Joule (J)

Joule is the unit of energy.
1J = 1 kg · 1(m / s)2

Kilowatt-hour (kWh)

Kilowatt-hour is a unit of energy.
1kWh = 1kW · 1h = 1000W · 1h

Kilovolt-amps (kVA)

Kilovolt-amps is a unit of power.
1kVA = 1kV · 1A = 1000 · 1V · 1A

Hertz (Hz)

Hertz is the unit of frequency. It measures the number of cycles per second.
1 Hz = 1 cycles / s
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 Reference:

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