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Electricity

QuestionAnswer
Neutral wire is what colour? Blue
Fuse is connected to what wire? Live wire
Earth pin is connected to what wire? Earth wire
Brown wire is called? Live wire
Why is a plug plastic casing? It protects people from the electricity
Why are plug pins made from brass? Brass is a good conductor of electricity
What is a fuse? Small cartridge with wire in it.
How does an earth wire help? It conducts the electricity back into it
What is a 3A fuse used for Radios, fans, lamps etc
What is a 5A fuse used for? Sound systems, microwave etc
What is a 13A fuse used for? Dishwasher, oven etc
Equation for power, p.d and current? Power= potential difference x current
Direct current The charge only flows in one direction
Alternating current It changes direction.
Equation for Energy transferred, p.d, and charge Energy transferred= p.d x charge
Equation for energy transferred, power and time Energy transferred=power x time
What are double insulated electronics? Uses reinforced protective insulation and basic insulation
Where is a step up transformer found? At or by the power station
Where is a step down transformer found? Closer to the consumer
Why is iron used for a transformer? Iron is magnetic
What does a transformer do? Increases voltage or reduces it or increases or reduces the current
For a step up transformer what coil has less turns? Primary more turns on secondary to make the p.d bigger
Why is a transformer important? IT is more efficient by preventing the loss of heat energy
UK mains voltage? 230V and 50Hz
Created by: Pbrad
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