# ampere

Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to ampere: Coulomb, Kelvin, Ohm, Watt, Ampere Law, Andre Marie Ampere

## ampere

(A) [am´pēr]
the base SI unit of electric current strength, defined in terms of the force of attraction between two parallel conductors carrying current.

## Am·père

(ahm'pēr),
André-Marie, French physicist, 1775-1836. See: ampere, statampere, Ampère postulate.

## am·pere (A),

(am'pēr),
1. The practical unit of electrical current; the absolute, practical ampere originally was defined as having the value of one tenth of the electromagnetic unit.
2. Legal definition: the current that, flowing for 1 second, will deposit 1.118 mg of silver from silver nitrate solution.
3. Scientific (SI) definition: the current that, if maintained in two straight parallel conductors of infinite length and of negligible circular cross-sections and placed 1 m apart in a vacuum, produces between them a force of 2 × 10-7 N/m of length.
[André-Marie Ampère]

## ampere

/am·pere/ (A) (am´pēr) the base SI unit of electric current strength, defined in terms of the force of attraction between two parallel conductors carrying current.

## ampere (A)

[am′pēr]
Etymology: André-Marie Ampère, French physicist, 1775-1836
a unit of measurement of the amount of electric current. An ampere, according to the meter-kilogram-second (MKS) system, is the amount of current passed through a resistance of 1 ohm by an electric potential of 1 volt; in the International System (SI) of Units, an ampere is a unit of electric current that carries a charge of 1 coulomb through a conductor in 1 second. The standard international ampere is the amount of current that deposits 0.001118 g of silver per second when passed, according to certain specifications, through a silver nitrate solution. See also ohm, volt, watt.

## am·pere

(A) (am'pēr)
1. The practical unit of electrical current; the absolute, practical ampere originally was defined as having the value of1/10 of the electromagnetic unit (see abampere and coulomb).
2. Legal definition: the current that, flowing for 1 second, will deposit 1.118 mg of silver from silver nitrate solution.
3. Scientific (SI) definition: the current that, if maintained in two straight parallel conductors of infinite length and of negligible circular cross-sections and placed 1 m apart in a vacuum, produces between them a force of 2 × 10-7 N/m of length.
[André-Marie Ampère]

## Ampère,

André-Marie, French physicist, 1775-1836.
ampere - the practical unit of electrical current.
Ampère postulate - Synonym(s): Avogadro law
statampere - the electrostatic unit of current, equal to 3.335641 X 10-10 ampere.

## am·pere

(A) (am'pēr)
1. The practical unit of electrical current.
2. Scientific (SI) definition: the current that, if maintained in two straight parallel conductors of infinite length and of negligible circular cross-sections and placed 1 m apart in a vacuum, produces between them a force of 2 × 10-7 N/m of length.
[André-Marie Ampère]

## ampere (am´pir),

n (Amp), a unit of measurement of the quantity of electric current, equal to a flow of 1 coulomb per second or 6.25 time 1018 electrons per second. The current produced by 1 volt acting through a resistance of 1 ohm.

## ampere

a unit of electric current strength, the current yielded by one volt of electromotive force against one ohm of resistance.
References in periodicals archive ?
The scientist at NPL and Cambridge still need to optimise the material and make more accurate measurements, but today's paper marks a major step forward in the road towards using graphene to redefine the ampere.
Because V/v is much easier to measure accurately than the actual geometry, watt balance experiments have a great advantage over ampere systems.
The AMPERE program is funded by a \$4 million grant from the National Science Foundation (NSF) to the Johns Hopkins Applied Physics Laboratory.
We expect to achieve a milestone of 100 amperes, 100 meters before the end of 2004, and thus be commercially viable in 2005, and in full scale production by 2006.
Households and businesses across the country pay up to \$100 per 5 amperes (1,100 watts) monthly to benefit from the services of these generators.
This step will encourage citizens to enter the electricity network and even raise their subscriptions from 5 amperes and 10 amperes to 15 amperes and even more without any extra charge," Bassil told reporters during a press conference.
By contrast, the number 12 copper wire used in most homes carries only 800 amperes of current per square centimeter.
Williams of the Massachusetts Institute of Technology notes that sprites typically occur after the strongest kind of cloud-to-ground lightning, which transports positive charge downward in currents that can exceed 100,000 amperes.
The voltage creates 5 million amperes of current that flow back to Jupiter through two separate circuits-magnetic field lines that originate form its north and south polar regions.
The PG0322NL inductors have a high heating current rating of 32 amperes to 60 amperes (A) and a high current saturation capability from 30A to 50A, ideal for high current, multiphase buck converter applications.
He found that the mean peak currents in New England measured around 25,000 amperes, compared with 40,000 to 45,000 amps in northern Florida.
The researchers achieved a current density of 600,000 amperes per square centimeter at 77 kelvins (-195[degrees]C) in a modest magnetic field of 0.

Site: Follow: Share:
Open / Close