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==Key Stage 3==
===Meaning===
The '''mains electricity''' is the [[electricity]] supply to houses, shops and [[Factory|factories]].
==Key Stage 4==
===Meaning===
The '''mains electricity''' is the [[electricity]] supply to houses, shops and [[Factory|factories]] provided by the [[National Grid]].
===About Mains Electricity===
: The '''mains''' in the houses in the [[UK]] provides a [[Potential Difference|potential difference]] of 230V and provides a maximum [[Electrical Current|current]] of 13A.
: The '''mains electricity''' is an [[Alternating Current|alternating current]] with a [[frequency]] of 50Hz.
{| class="wikitable"
|[[File:OscilloscopeScreenAC1.png|center|400px]]
|-
| style="height:20px; width:200px600px; text-align:center;" |An [[oscilloscope]] trace of '''mains electricity''' shows its [[frequency]] is 50Hz as the time [[period]] is 0.02s per oscillation and the peak [[Potential Difference|potential difference]] is 320V, but the [[Mean Average|average]] over time is 230V.
|}
: The [[Power Supply|power supply]] for the '''mains electricity''' is a variety of [[Energy Resource|energy resources]] including; [[Coal#Power|Coal]], [[Natural Gas#Power|Natural Gas]], [[Nuclear Fuel#Power|Nuclear Fuel]] and [[Wind Power#Power|Wind]].
{| class="wikitable"
|-
|[[File:UKEnergySupply2014.png|center|400px]]
|-
| style="height:20px; width:200px600px; text-align:center;" |The [[percentage]] of the [[United Kingdom]]'s [[electricity]] generated by different '''energy resources''' 2014 is shown in a [[Pie Chart|pie chart]].
|}
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Mains electricity, pages 305-6, GCSE Combined Science Trilogy 1, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Mains electricity, pages 50-1, GCSE Physics, Hodder, AQA '']
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Mains electricity, page 156, GCSE Physics, Pearson Edexcel '']
:[https://www.amazon.co.uk/gp/product/1292120193/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120193&linkCode=as2&tag=nrjc-21&linkId=572df39392fb4200db8391d98ae6314e ''Mains electricity, page 396, GCSE Combined Science, Pearson Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Mains electricity, pages 232-233, Gateway GCSE Physics, Oxford, OCR '']