# Alex's Phis

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• Created by: Alex
• Created on: 21-05-13 15:07
• Physics
• Electricity
• Mains Electricity
• I't the electricity that is supplied to our homes
• It Powers:
• Lights
• Computers
• Kettles
• Electric Heaters
• The Mains Sockets they  power:
• Phone chargers
• Laptops
• Vacumes
• Untitled
• It is supplied by underground cables
• It will then go in to an electricity meter Which measures the amount of electricity used
• It then goes into a consumer unit or fuse box
• The fuse box is a key peace of electrical equipment
• If the current is to large for what ever reason then the fuse will break Saving all your electrical goods
• This works because when electricity has a high current it get's quite hot so if you get the type and thickness of wire correct it will melt when the current gets to high breaking the circuit
• All Electrics are wired in a certain way In England
• It has a live wire which carries the current and this wire is the one with the fuse attached
• It has a neutral wire which the current exits through (to complete a circuit)
• How ever in England we have a Earth wire which is a safety feature
• If an appliance has a metal casing then an earth wire is needed to stop someone dying in a fault
• If the live wire touches the metal casing then a person does they will get a SHOCK
• When the live wire touches the casing then the current will flow down the low resistance Earth wire increasing the current and so melting the fuse
• The Electricity leaves the fuse box and ends up in the ring circuit
• The ring circuit is where we can access the electricity from through the mains
• Heat
• Heat Loss
• Heat can be lost by evaporation
• Evaporation is when the hot or vibrating molecules evaporate off meaning that there aren't any hot molecules left  just the slow vibrating cold ones

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