دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

(A) n: the fundamental unit of electrical current;1 ampere = 6.28 x 1018 electrons passing through the circuit per second. One ampere delivers I coulomb in 1 second. ampere-hour n: a unit of electricity equal to the amount produced in 1 hour by a flow of I ampere. See ampere.

n: the number of turns in a coil multiplied by the number of amperes of current flowing through the coil.

n: (SI) a system of units of measurement based on the metric system, adopted and described by the Eleventh General Conference on Weights and Measures. It provides an international standard of measurement to be followed when certain customary units, both US and metric, are eventually phased out of international trade operations. The symbol SI (Le Syste`me International dUnites) designates the system, which involves seven base units: (1) metre for length, (2) kilogram for mass, (3) second for time, (4) Celsius for temperature, (5) ampere for electric current, (6) candela for luminous intensity, and (7) mole for amount of substance. From these units, others are derived without introducing numerical factors.

n: (Ω) a unit for measuring electrical resistance. One ohm is equal to the resistance through which a current of 1 ampere will flow when a potential difference of 1 volt exists across a circuit.

electrical unit of resistance. One ohm is the the resistance through which a potential of one volt will maintain a current of one ampere.