Topic Five - Generation And Transmission Of Electricity Flashcards
(14 cards)
What is voltage
An electrical pressure giving a measure of the energy
What is electrical power
The energy transferred per second
How can you create a current in a coil of wire
Moving a magnet in or near it > called electromagnetic induction
How do you get a bigger current
Increase .... ~ strength of the magnet ~ area of the coil ~ number of turns on the coil ~ speed of movement
How do generators work
Generators generate currents by electromagnetic induction
They do this by rotating a magnet or by rotating a coil of wire and keeping the magnet fixed
They generate an alternating current
Now - renewable resources
Fossil fuels > coal, oil and natural gas
Nuclear fuels
(They will all run out, they all damage the environment, provide most of our energy)
Environmental problems of non-renewables
Cause climate change
Can cause acid rain
Makes a mess of the landscape
Cause serious environmental problem can release dangerous radioactive material into the atmosphere
Renewable resources
Hydroelectricity, wave power and solar power
What is current
Flow of charge
Define voltage
An electrical pressure giving a measure of the energy transferred
Power
The energy transferred by second
Amp
Unit of current
Volt
Unit of potential difference
Define current
Rate of flow of charge
