ampere

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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 ?
In addition, some effects that are not observed at higher levels are important at femtoamp and attoamp levels.
The troubleshooting techniques described here can be used to obtain valid readings of femtoamp and lower currents with known uncertainties.
OLEDs are current-driven rather than voltage-driven, and measuring their characteristics effectively requires instrumentation that can source and measure currents over many decades--from milliamps to femtoamps.
Many instruments might list relatively low current measurement sensitivity in their specifications, but the sensitivity could prove useless if the required input cabling adds several femtoamps of noise that exceed the low current the user wants to measure.

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