Ch 1.a - Common Unit Definitions

Below are some of the more common definitions and math to go along with them.
 

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

 

Hertz (Hz)
Hertz is the unit of frequency. It measures the number of cycles per second.
1 Hz = 1 cycles / s
 
Special thanks goes out to the guys at RapidTables.com for putting this together