- Mostly generated in places called power stations.
- Power stations use heat to turn water into steam.
*The force of the steam pressure turns giant fan-like structures called turbines, which are linked to machines called 'generators'.
* Generators have a head with wires which spins inside a magnetic field.
* Electromagnetic induction causes electricity to flow through the wires.
- Generating electricity without heat:
* Natural flow eg. wind power or water power can be used to directly turn a generator.
- Heat sources can be classified into two types:
* Renewable energy resources : The supply of heat energy never runs out.
* Non-renewable energy resources : The supply will eventually be used up.
- Solid-state electricity sources have no moving parts.
Edited from,
~http://simple.wikipedia.org/wiki/Electricity
~http://www.google.com.my/imghp?hl=en&tab=wi
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