Changes

: [[Speaker]]s use an [[electromagnet]] coil of wire and a [[Permanent Magnet|permanent magnet]] to [[vibration|vibrate]] a paper cone.: When the [[Electrical Current|current]] changes direction the paper cone moves. An [[Alternating Current|alternating current]] causes the cone in the [[speaker]] to [[Vibration|vibrate]]. {| class="wikitable"|-|[[File:SpeakerDiagram.png|center|400px]]|-| style="height:20px; width:200px; text-align:center;" |A [[diagram]] of a [[speaker]].|} ==Key Stage 4=====Meaning===[[File:Speaker.png|right|300px|thumb|A picture of a [[speaker]].]]A [[speaker]] is an electrical device that uses the [[Motor Effect|motor effect]] to [[vibration|vibrate]] a diaphragm to produce a [[sound]]. ===About Speakers===: [[Speaker]]s have a coil of [[wire]] and a [[Permanent Magnet|permanent magnet]] to use the [[Motor Effect|motor effect]] to [[vibration|vibrate]] a diaphragm attached to the coil of [[wire]].: When the [[Electrical Current|current]] changes direction the coil of [[wire]] moves. An [[Alternating Current|alternating current]] causes the coil in the [[speaker]] to [[Vibration|vibrate]] the diaphragm.