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...n the [[International System of Units]] (SI) relating mechanical force and electric current in [[classical vacuum]] with a defined value {{nowrap|''μ₀''}

Electric current in the Gaussian system of units; symbol statA; 1 statA = 1 A/(10⋅''c'

...ductor]] device that allows a signal at its input terminal(s) (usually a [[Electric current|current]] or a [[Voltage|voltage]]) to control an output signal at its outp

...over a closed surface that may envelop one or more permanent magnets and electric current carrying wires. The law is called after the German mathematician [[Carl Fr ...es not exist, neither as permanent monopole, nor as monopole induced by an electric current. This law expresses the empirical fact that division of a permanent magnet

'''Ohm's law''' is the name of the relationship between an electric current (denoted by ''I'') flowing through a conductor and the voltage difference '

...mics]], '''Ampère's law''' relates the strength of a magnetic field to the electric current that causes it. The law was first formulated by [[André-Marie Ampère]] ar We consider a closed curve ''C'' around an electric current ''i''. Other than the current ''i'' there is no matter present; this is the

Ampère's law states that an electric current through a wire causes a magnetic field encircling the wire. In a very simil ...figure on the right a [[capacitor]] (with green plates) is charged by an [[electric current]] ''I''. The conduction current ''I'' is related to the current density ''

The '''ampere''', symbol '''A''', is the [[SI]] unit of [[electric current]]. It is defined *{{cite web|url=http://physics.nist.gov/cuu/Units/ampere.html|title=Unit of electric current (ampere)|work=The NIST reference on constants, units, and uncertainty|acces

...m the relation which states that dissipated power ''P'' is proportional to electric current ''i'' and voltage difference ''V'',

...ring electrolysis was the accepted manner of measuring electric charge and electric current.

{{r|Electric current}}

...is system is also referred to as the ''MKS system''. Sometimes the unit of electric current, the [[ampere]], is added to the system and then it is referred to as the '

where ''i'' is electric current (in ampere) and dissipated power is ''P'' (in watt = J/s), follows that the

{{r|Electric current}}

...straight conductor|Biot-Savart law]] giving the field |'''H'''| due to an electric current ''I'' in an infinitely long straight conductor, ...ic flux density and the oersted is defined through the field created by an electric current.

In [[physics]], the '''abampere''', symbol abA, is the unit of electric current in the cgs-emu (centimeter-gram-second electromagnetic) system of units:

...st and chemist. He is best known for his discovery of the influence of an electric current on the orientation of a compass needle (April 1820).

{{r|Electric current}}

...1831 on basis of observations that a change in a magnetic field induces an electric current. This is the phenomenon of electromagnetic induction. ...etic flux that cuts across the circuit. By [[Ohm's law]] an EMF induces an electric current in a conductor.