Elektriese stroom: Verskil tussen weergawes
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Lyn 13:
== Stroom in 'n metaaldraad ==
In 'n soliede [[elektriese geleier|geleidende]] metaal is daar 'n groot aantal mobiele [[vrye elektron|vrye elektrone]]. Hierdie elektrone is aan die metaalraamwerk verbind maar nie tot enige indiwiduele atoom nie. Selfs sonder die toepassing van 'n eksterne elektriese veld, beweeg hierdie elektrone willekeurig rond as gevolg van [[termiese energie]]
[[Beeld:Stranded lamp wire.jpg|thumb|'n Tipiese metaaldraad wat gebruik word vir elektriese geleiding is die gevlegde [[koper|koperdraad]].]]
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When a metal wire is connected across the two terminals of a [[Direct current|DC]] [[voltage source]] such as a [[battery (electricity)|battery]], the source places an electric field across the conductor. The moment contact is made, the [[free electron]]s of the conductor are forced to drift toward the [[positive]] terminal under the influence of this field. The free electron is therefore the [[current carrier]] in a typical solid conductor. For an electric current of 1 ampere rate, 1 [[coulomb]] of [[electric charge]] (which consists of about 6.242 × 10<sup>18</sup> electrons) drifts every [[second]] through the imaginary plane through which the conductor passes.
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