Difference between revisions of "Electrical Insulator"
(6 intermediate revisions by one other user not shown) | |||
Line 1: | Line 1: | ||
− | + | ==Key Stage 2== | |
+ | ===Meaning=== | ||
+ | [[File:Wire3Core.png|right|300px|thumb|[[Wire|Wires]] have [[Plastic (Material)|Plastic]] covering them because [[Plastic (Material)|Plastic]] makes a good '''electrical insulator'''.]] | ||
+ | An '''electrical insulator''' is a [[material]] that does not allow [[electricity]] to flow through it easily. | ||
+ | |||
+ | : Singular [[Noun]]: '''Electrical insulator''' | ||
+ | : Plural [[Noun]]: '''Electrical insulator''' | ||
+ | : [[Verb]]: '''To electrically insulate''' | ||
+ | : [[Adjective]]: '''Electrical insulation''' | ||
+ | |||
+ | ===About Electrical Conductors=== | ||
+ | : [[Plastic (Material)|Plastic]], [[rubber]] and the [[air]] make good '''electrical insulators'''. | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |[[File:BrickWall.png|center|200px]] | ||
+ | |[[File:Fabric.png|center|200px]] | ||
+ | |[[File:CupGlass.png|center|200px]] | ||
+ | |- | ||
+ | |[[Brick]] is a good '''electrical insulator'''. | ||
+ | |[[Fabric]] is a good '''electrical insulator'''. | ||
+ | |[[Glass]] is a good '''electrical insulator'''. | ||
+ | |- | ||
+ | |[[File:CupPlastic.png|center|200px]] | ||
+ | |[[File:Mountain.png|center|200px]] | ||
+ | |[[File:TyreRubber.png|center|200px]] | ||
+ | |- | ||
+ | |[[Plastic (Material)|Plastic]] is a good '''electrical insulator'''. | ||
+ | |[[Rock]] is a good '''electrical insulator'''. | ||
+ | |[[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'''. | ||
+ | |||
+ | ==Key Stage 4== | ||
+ | ===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''' as [[electron]]s are not free to move from one [[atom]] to another. [[Carbon]] in the form of [[graphite]] is an exception to this. | ||
+ | : [[Plastic (Material)|Plastic]]s are good '''insulators''' because [[Covalent Bond|covalent bonds]] share [[electron]]s but do not allow [[electron]]s to be transferred from one [[atom]] to another. | ||
+ | : [[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 the [[ratio]] of [[Potential Difference|potential difference]] to [[Electrical Current|current]] is high then it is a good '''insulator'''. | ||
+ | |||
+ | ===References=== | ||
+ | ====AQA==== | ||
+ | |||
+ | :[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Electrical insulators, page 99, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA ''] |
Latest revision as of 10:44, 4 November 2019
Contents
Key Stage 2
Meaning
An electrical insulator is a material that does not allow electricity to flow through it easily.
- Singular Noun: Electrical insulator
- Plural Noun: Electrical insulator
- Verb: To electrically insulate
- Adjective: Electrical insulation
About Electrical Conductors
Brick is a good electrical insulator. | Fabric is a good electrical insulator. | Glass is a good electrical insulator. |
Plastic is a good electrical insulator. | Rock is a good electrical insulator. | Rubber is a good electrical insulator. |
Key Stage 3
Meaning
An electrical insulator is a material with a very high resistance to the flow of electricity.
About Electrical Conductors
- Non-metal elements are usually good electrical insulators. Carbon in the form of graphite is an exception to this.
- Metal elements are poor electrical insulators.
- To determine if an object is a good electrical insulator the object can be added to a circuit. If a 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 current the worse the object is at insulating.
Key Stage 4
Meaning
An electrical insulator is a material with a very high resistance to the flow of electricity.
About Electrical Conductors
- Non-metal elements are usually good electrical insulators as electrons are not free to move from one atom to another. Carbon in the form of graphite is an exception to this.
- Plastics are good insulators because covalent bonds share electrons but do not allow electrons to be transferred from one atom to another.
- Metal elements are poor electrical insulators.
- To determine if an object is a good electrical insulator the object can be added to a circuit. If the ratio of potential difference to current is high then it is a good insulator.