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Wire
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==Key Stage 4==
===Meaning===
A '''wire''' is a long, thin piece of [[metal]] that allows [[electricity ]] through it.
===About Wires===
: [[Wire]]s are [[heated]] by an [[Electrical Current|electrical current]] passing through them.
: [[Wire]]s are designed to be a low [[Electrical Resistance|resistance]] in order to allow an [[Electrical Current|electrical current]] through them without losing too much [[energy]] by [[heating]] the [[wire]]s.
: When there is a [[Electrical Current|current]] in a [[wire]] the [[wire]] has a [[Magnetic Field|magnetic field]] which acts around that [[wire]].
{| class="wikitable"
|-
|[[File:MagneticFieldLinesWire.png|center|300px]]
|[[File:RightHandThumbRule.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |The [[Magnetic Field|magnetic field]] of a [[Electrical Current|current]] carrying [[wire]].
| style="height:20px; width:300px; text-align:center;" |The direction of the [[Magnetic Field|magnetic field]] can be shown by the 'right hand thumb rule' with thumb pointing in the direction of the [[Electrical Current|current]] the fingers will wrap around in the direction of the [[Magnetic Field|magnetic field]].
|}