Electrical & Electronic units

What is ampere?

It is measuring unit of the rate of electron flow or current in an electrical conductor. One ampere current means one coulomb of electrical charge (6.24 x 1018 charge carriers) which is moving past an exact point in one second. Physicists think about current to flow from relatively positive points to relatively negative points; this is called conventional current or Franklin current. According to Andre Marie Ampere, French physicist Ampere name is placed.

What is dBm?

Generally, the term dBm is used to describe signal strength in wires and cables in RF and AF frequencies. The symbol is a short form for “dB-milliwatt," where one milliwatt (1 mW) equals 1/1000 of a watt. It is an electrical power unit in decibels (dB), referenced to 1 milliwatt (mW).

1 milliwatt is equal to 0 dBm:

1mW = 0dBm

1 watt is equal to 30dBm

1W = 1000mW = 30dBm

What is dBw?

The decibel watt or dBW is the unit of the strength of a signal expressed in decibels to one watt. It is used to express both large and small values of power in a short range of number. dBW or decibel-watt is a unit of power in decibel scale, referenced to 1 watt (W).

1 watt is equal to 0 dBW:

1W = 0dBW

1 milliwatt is equal to -30dBW

1mW = 0.001W = -30dBW

What is decibel?

The decibel (dB) is used to determine sound level, but it is widely used in electronics, signals and communication. The dB is a logarithmic way of relating a ratio between two signal powers, current, or voltage levels. The ratio may be sound pressure, power, voltage or quite a few other things. Decibel units are generally used in both the hardware kind and the software kind, audio equalizers, as a convenient reference point while editing.

What is farad?

The standard unit of capacitance is farad in the International System of Units (SI). Base on SI units, one farad is the equal of one second to the fourth power ampere squared per kilogram per meter squared. When the voltage pass through a 1 F capacitor its changes at a rate of one volt per second (1 V/s), a current flow of 1 A results. It produces 1 V of potential difference for an electric charge of one coulomb. The extremely large unit of capacitance is farad.

Units of microfarads (µF), where 1 µF = 10-6 F, and picofarads (pF), where 1 pF = 10-12 F, are used.

What is kVA?

kVA is most widely used in electronics circuit. kVA means kilo-volt-ampere. kVA is a unit of apparent power, which is electrical power unit.

1 kilo-volt-ampere is equal to 1000 volt-ampere

1kVA = 1000VA

1 kilo-volt-ampere is equal to 1000 times 1 volt times 1 ampere

1kVA = 1000·1V·1A

What is kW?

The unit of power measurement is Kilowatt (kW). The kilowatt is equal to one thousand watts

One kilowatt (kW) is equal to 1000 watts (W):

1kW = 1000W

One kilowatt is defined as energy utilization of 1000 joules for 1 second:

1kW = 1000J / 1s

One kilowatt is equal to 1000000 milliwatts:

1kW = 1000000mW

What is kWh?

The unit of energy is kilowatt-hour. It is equivalent to one kilowatt of power spent for one hour of time. The kilowatt-hour is not a standard unit in any formal system, but it is commonly used in electrical applications.

An energy outflow of 1 kWh represents 3,600,000 joules (3.600 x 106 J). Simply convert between kWh to joules or Joules to kWh, multiply by 3.600 x 106 or multiply by 2.778 x 10-7.

What is Ohm?

The SI unit of electrical resistance passes on a current of one ampere when subjected to a potential difference of one volt. The standard unit of electrical resistance is Ohm. It is the International System of Units (SI) of resistance. Reduced to base SI units, one ohm is the equivalent of one kilogram meter squared per second cubed per ampere square. The ohm is also the correspondent of a volt per ampere (V/A).

In a DC circuit, a component has a resistance of one ohm when a potential difference of one volt produces a current of one ampere through the component. Resistive ohms act the same as they act in DC circuits, provided the root-mean-square (rms) AC voltage is specified. In AC and RF circuits, reactance exists only when there is a net capacitance or inductance.