# 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),## 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 10

^{18}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.

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