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: A '''switch''' turns things on by connecting the wires to complete the circuit.
: A [[circuit]] should always have a '''switch''' in it so it can be turned off if anything goes wrong.
{| class="wikitable"
|-
|[[File:ElectricalSwitch.png|center|200px]]
|[[File:SwitchOpenSymbol.png|center|200px]]
|-
|A '''switch'''.
|The symbol for a '''switch'''.
|}