Volt – unit of electrical potential, potential difference, voltage and electromotive force in the International system of units (SI). Volt as a unit of measurement is the Russian designation In the international designation – V.
Other units of measurement
Volt – unit of electrical potential, potential difference, voltage and electromotive force in the International system of units (SI), named after the Italian physicist and physiologist Alessandro Volta.
Volt as a unit of measurement is the Russian designation In the international designation – V.
There are several definitions of a volt.
The potential difference between two points is 1 volt (C) if the moving charge magnitude of 1 Coulomb (C) from one point to another above it is necessary to perform work quantity 1 Joule (j).
1 volt (V) an electrical tension that caused in the electric circuit a constant current of 1 ampere (A) at a power of 1 watt (W). Or 1 volt is equal to the electric voltage at the ends of the conductor necessary for the allocation in this heat with a power of one watt (W) when power flows through the conductor DC at one ampere (A).
1 volt (V) is equal to the potential difference across the resistor in 1 Ohm (Ω) when the flow through it of current in 1 ampere (A).
A = (m2 · kg) / (S3 · A) = j / KL = A / Ω = W / a = A · Ohms.
1 = (1-m2 · 1 kg) / (C3 1 · 1 A) = 1 j / 1 C = 1 A / 1 Ohm = 1 watt / 1 A = 1 A · 1 Ohm.
In the International system of units volts, put the decision of the XI General conference on weights and measures in 1960, simultaneously with the adoption of the SI as a whole. In accordance with the rules SI, and relating the derived units are named for scientists, the name of the unit “volt” is spelled with a lowercase letter and its name — with a capital (In). Such writing of the designation is stored in the symbols for derived units formed by using the volt.
Volts measure electric potential, potential difference, voltage and electromotive force.
Through the basic and derived SI units volts is expressed as follows:
A = (m2 · kg) / (S3 · A)
In = J / KL
In = A / Ω
V = W / A
V = A · Ohms
where A is amperes, In volts, KL – pendant, j – Joule, m = meter, s – second W – watt, kg – kilo, of om – Om.
Multiple and sub-multiple units are formed using standard prefixes of the SI.
|102 In||echovolt||GW||hV||10-2 In||santigold||SV||cV|
|103 In||kV||kV||kV||10-3 In||millivolts||mV||mV|
|1012 To||terravolt||TV||TV||10-12 In||PV||PV||pV|
|1015 To||metabolic||PV||PV||10-15 In||femtovolt||fV||fV|
|1018 To||exavault||EV||EV||10-18 In||attualit||AV||aV|
|1021 To||sattawat||THIS||CL||10-21 In||septodont||this||CL|
The smallest measurable voltage is about 10 NV.
The potential difference on the membrane of the neuron is 70 mV.
The voltage of conventional AA battery AA 1.5 V (DC).
Power of computer components has a voltage of – 5 V, 12 V (DC).
The voltage of the electrical equipment of automobiles – 12 In, for heavy trucks – 24 V (DC).
The voltage in the batteries of cars, 12/24 V (DC).
The voltage of a laptop power supply and LCD monitors – 19 In (permanent).
“Safe” low voltage in hazardous conditions – 36-42 In (AC).
The voltage in the phone line (at the lowered tube) – In 50 (DC).
Power supply Japan – 100 / 172 In (three-phase).
The home voltage US is 120 / 240V (split-phase) (three phase AC).
The voltage of household electricity Russia is 220 / 380V (three phase AC).
The electrical discharge chute up to 200-250 (permanent).
The discharge of the electric eel – up to 650 V (constant).
The voltage at the spark plug of the car – 10-25 kV (pulsed).
The voltage in the contact network of tram, trolley – 600 V (660 V) (permanent).
The voltage on the third rail in the subway – 825 In (permanent).
The voltage in the contact network of Railways – 3 kV (DC), 25 kV (AC).
Voltage trunk lines– 110, 220, 330, 500, 750 and 1150 kV (three-phase).
The high DC voltage obtained in the laboratory is 25 MV.
Lightning has a voltage of 100 MV and above (permanent).
* in brackets the type strain.
Note: © Photo ,