what is the unit of an electrical current?

Answer 1

Amp

http://en.wikipedia.org/wiki/Electrical_current

Answer 2

Amp - or Ampere, the unit of intensity of electrical current (the measure of electrical flow), is abbreviated a or A.

Watt - the unit of power or rate of work represented by a current of one ampere under a pressure of one volt (abbreviated w orW). The English horsepower is approximately equal to 746 watts. Wattage ratings of lamps actually measure the power consumption not the illuminating capability

Volt - the unit of electromotive force, the measure of electrical pressure, is abbreviated v or V, and voltage is represented by I. The voltage (of a circuit) is the effective (greatest root-mean-square) difference of potential between any two conductors of the circuit concerned. Some systems, such as 3-phase 4-wire and single-phase 3-wire may have multiple circuits of differing voltages. The Nominal Voltage is the value assigned to a circuit to conveniately designate its voltage class (e.g. 120 volts, 240 volts, 277 volts). The actual voltage of the circuit can vary.


Basic Electrical Terms

Volt
Amp
Watt
Ohm

Kilowatt-hour
Ohm's Law
Service
Transformer

GFCI
Single Phase
Three Phase
NEC

Circuit Breaker
Fuse
Listed
Accessible

Labeled
Overload
Overcurrent
Raceway

Ground
Device
Box
Circuit

Conductor
Equipment
Lamp
AC and DC

Answer 3

electrical current: ampere.

Here, I cut&pasted the hydrolic analogy from Wikipedia.

In the hydraulic analogy sometimes used to explain electric circuits by comparing them to water-filled pipes, voltage is likened to water pressure - it determines how fast the electrons will travel through the circuit. Current (in amperes), in the same analogy, is a measure of the volume of water that flows past a given point, the rate of which is determined by the voltage, and the total output measured in watts. The equation that brings all three components together is: volts × amperes = watts

Answer 4

that is an Amp (finished call Ampere) The ampere is that consistent present day which, if maintained in 2 straight away parallel conductors of countless length, of negligible around go section, and found a million meter aside in vacuum, might produce between those conductors a rigidity equivalent to 2×10–7 newton in line with meter of length. electric present day is the time fee of substitute or displacement of electric fee. One ampere represents the linked fee of a million coulomb of fee in line with 2d. The ampere is defined first (that could be a base unit, alongside with the metre, the 2d, and the kilogram), with out connection with the quantity of fee. The unit of fee, the coulomb, is defined to be the quantity of fee displaced by technique of a one ampere present day interior the process one 2d.

Answer 5

An Ampere, named after André-Marie Ampère, the 19th century French scientist credited with discovering electromagnetism.

Amperes, the SI unit of current, are usually abbreviated as amps, and their symbol in electrical diagrams is the capital letter A.

When used in an equation, however, capital I ('eye') stands in for current.

For electrical engineers, the all-important equation is V=IR, or voltage is equal to current times resistance. In SI, the units of voltage are volts (V), and the units of resistance or Ohms [R in equations, and capital Greek Omega (Ω) in units].

Watts are not a measure of electrical current, but electrical power. In an equation, one can represent the relationship of power to current like this: P=I^2/R (Power is equal to the current squared over resistance).

Hope this helps!

Answer 6

Not the watt, that is a unit of power. The unit for current is the amp(ere), which is..

"Since a coulomb is approximately equal to 6.24150948×10^18 elementary charges, one ampere is approximately equivalent to 6.24150948×10^18 elementary charges, such as electrons, moving past a boundary in one second." (wikipedia)

Wikipedia also mentions the posibility of a future redefinition which will make the amp equal to an exact number of charges, tho previously I had thought it already was.

Answer 7

No, the SI unit of electrical current is the ampere (A)

Answer 8

Ampere

Answer 9

Deborah you need to start attending class I believe!!!!

Its the Ampere anyways (Amp for short)......What ever your using it for you probably need ohm's law as well which is;

V=IR

Where V=Voltage
I = Current
R = Resistance

Have a look at this site too;

http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGIE,GGIE:2006-39,GGIE:en&q=ohms+law

Best of luck.......

Answer 10

Ampere