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|[[Rubber]] is a good '''electrical insulator'''.
|}
==Key Stage 3==
===Meaning===
An '''electrical insulator''' is a [[material]] with a very high [[Electrical Resistance|Resistance]] to the flow of [[electricity]].
===About Electrical Conductors===
: [[Non-metal]] [[element]]s are usually good '''electrical insulators'''. [[Carbon]] in the form of [[graphite]] is an exception to this.
: [[Metal]] [[element]]s are poor '''electrical insulators'''.
: To determine if an [[object]] is a good '''electrical insulator''' the [[object]] can be added to a [[circuit]]. If a [[Electrical Current|current]] flows then it is not a good '''insulator'''.
: To compare the effectiveness of different '''insulators''' an [[ammeter]] can be added to the [[circuit]]. The higher the [[Electrical Current|current]] the worse the [[object]] is at [[insulating]].