ampere (redirected from Femtoamp)

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.

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am·pere (mpîr)

n. Abbr. A

1. A unit of electric current in the meter-kilogram-second system, equal to the current that, flowing in two parallel wires one meter apart, produces a force of 2 × 10^-7 newtons per meter.

2. A unit in the International System specified as one International coulomb per second and equal to 0.999835 ampere.

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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.

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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.

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ampere

a unit of electric current strength, the current yielded by one volt of electromotive force against one ohm of resistance.