Difference between revisions of "Electrical Insulator"
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: [[Metal]] [[element]]s are poor '''electrical insulators'''. | : [[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'''. | : 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'''. | ||
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+ | ===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.