3 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Voltage \Vol"tage\, n. (Elec.)
Electric potential or potential difference, expressed in
volts.
From WordNet r 1.6 [wn]:
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 [syn: {electromotive force}, {emf}]
2: the difference in electrical potential between two points in
a circuit expressed in volts [syn: {potential difference},
{potential drop}]
From The Free On-line Dictionary of Computing (13 Mar 01) [foldoc]:
voltage
(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)
more about voltage
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