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voltage    音标拼音: [v'oltədʒ] [v'oltɪdʒ]
n. 电压,伏特数

电压,伏特数

voltage
电压调整率

voltage
电压

voltage
n 1: the rate at which energy is drawn from a source that
produces a flow of electricity in a circuit; expressed in
volts [synonym: {voltage}, {electromotive force}, {emf}]
2: the difference in electrical charge between two points in a
circuit expressed in volts [synonym: {electric potential},
{potential}, {potential difference}, {potential drop},
{voltage}]

Voltage \Vol"tage\, n. (Elec.)
Electric potential or potential difference, expressed in
volts.
[1913 Webster]

(Or "potential difference", "electro-motive
force" (EMF)) A quantity measured as a signed difference
between two points in an electrical circuit which, when
divided by the {resistance} in {Ohms} between those points,
gives the current flowing between those points in {Amperes},
according to {Ohm's Law}. Voltage is expressed as a signed
number of Volts (V). The voltage gradient in Volts per metre
is proportional to the force on a charge.

Voltages are often given relative to "earth" or "ground" which
is taken to be at zero Volts. A circuit's earth may or may
not be electrically connected to the actual earth.

The voltage between two points is also given by the charge
present between those points in {Coulombs} divided by the
{capacitance} in {Farads}. The capacitance in turn depends on
the {dielectric constant} of the insulators present.

Yet another law gives the voltage across a piece of circuit as
its {inductance} in {Henries} multiplied by the rate of change
of current flow through it in Amperes per second.

A simple analogy likens voltage to the pressure of water in a
pipe. Current is likened to the amount of water (charge)
flowing per unit time.

(1995-12-04)


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  • What exactly is voltage? - Electrical Engineering Stack Exchange
    What is voltage? It's a stack of invisible membranes which fill the space between charged capacitor plates Voltage is the pattern of concentric onion-layers which surround any charged object, with the onion-layers running perpendicular to the flux-lines of the electric field So, 'stacks of voltage-layers' is one way of describing an electric
  • How much voltage current is dangerous?
    Likewise, if the current and voltage are below a certain level, a person can--given enough time--safely absorb an arbitrarily large amount of electrical energy Further, if voltage is sufficiently low, the amount of current that can flow as a consequence of such voltage will be too low to cause harm \$\endgroup\$ –
  • voltage - Minimum clearance between two traces that have a potential . . .
    The accepted creepage distance depends on the Comparative Tracking Index (CTI) of the pcb material (in the table it is the "material"), on pollution degree, if traces are on the same or different layers, if the required insulation is Basic, Functional, Double (or Reinforced), that depends on the working voltage of the connected circuits, also
  • voltage - What is the difference between RMS and DC? - Electrical . . .
    The RMS voltage is about 1 11 times higher than the average for a sine wave A cheap multimeter on AC current and voltage ranges will full-wave rectify the input signal and then display a number 1 11 times higher than the actual voltage to give the user an approximately correct number for a sine wave input
  • voltage - What does 3V3 or 1V8 mean? - Electrical Engineering Stack . . .
    character in net names (Well, I think it was " " chars, I removed them and it fixed the problem) Using "3v3" or "1v8" is an easy way to clearly describe the voltage while restricting net names to exclusively alphanumeric characters \$\endgroup\$ –
  • voltage - How does data travel inside a wire? - Electrical Engineering . . .
    Current and voltage are inseperable The current is flowing because there is a voltage on the wire, and there is a conductive path from that voltage to a lower voltage So we can say the data is encoded as voltage pulses or current pulses, it doesn't really matter Often a high voltage (5 V) indicates a "1" and a low voltage (0 V) indicates a "0"
  • voltage - What is the difference between Vrms and Vm? - Electrical . . .
    The RMS value of a waveform is the DC-equivalent voltage It means, that if you have a sine wave with an RMS value of 10 volts RMS, in order to deliver the same power via DC voltage, you would need 10 volts DC Don't confuse the average magnitude with the RMS voltage; V av does not equal V rms In fact, technically, the average voltage of an
  • voltage - Calculate battery state of charge percentage - Electrical . . .
    What is the correct formula to calculate battery state of charge percentage based on the battery type (12v, 24v, 48v and so on) and the current battery voltage For example if I have a 12v battery
  • Whats up with the operating voltages 5 V, 3. 3 V, 2. 5 V, 1. 8 V, etc. ?
    Chip designers know that 1 8V is an oddball voltage and will often have an internal regulator to provide the core voltage for the chip itself, sparing the designer from having to generate the core voltage For an example of the dual-voltage situation take a look at the ENC28J60 which runs on 3 3V, but has an internal 2 5V regulator





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