P1.4 Flashcards
What are the energy transfers when electricity is generated?
Fossil Fuels (Chemical)»_space; Water/steam (Heat)»_space; Turbines (Kinetic)»_space; Generator (Electricity)
Types of Fossil Fuels are…
Coal, Oil, Natural Gas
How is steam created and how is it used?
Steam is created through boiling water. It is used to push around a turbine, to generate electricity
What other ways can you generate electricity?
Fossil Fuel, Solar, Nuclear, Wind, Wave, Tidal and Hydroelectric.
How is Coal formed?
Plants die and are buried under sediment sand. Over millions of years it turns to coal which is then dug up and burnt.
What are the advantages of using coal as a fossil fuel?
It is common to find, easy to transport and is a cheap energy source.
What are the advantages of using Oil as a fossil fuel?
It can be transported easily, and it can be found all over the world.
What are the advantages of using natural gas as a fossil fuel?
It can be transported easily through pipes, and can be found all over the world.
What are the disadvantage of using Oil as a fossil fuel?
It is not renewable, burning it releases greenhouse gases into the atmosphere, and the price is increasing because it is finite.
What are the disadvantage of using coal as a fossil fuel?
It requires mines which are dangerous and miners get ill from the process, it is non renewable
What are the disadvantage of using Natural gas as a fossil fuel?
It is non renewable and it releases carbon dioxide into the atmosphere
How is electricity supplied?
Electricity comes from the power station(which a high current) to a step up transformer(which lowers the current) to the national grid and then it goes to a step down transformer (which turns it to high current) and then into the home.
At what voltage is electricity supplied to your home?
230 volts
What happens at a high voltage?
There is a low current which lowers heat loss
What happens at a low voltage?
There is a high current which highers the heat loss
