VIEWS: 132 PAGES: 10 POSTED ON: 8/18/2012
What do you think? • Complete the following statements. 1. “Electricity is…” 2. “Electricity comes from…” What is it? • It is NOT just the flow of electrons – That is one instance of electricity. • It IS the flow of charged particles. – Electrons – Protons (if you can get them by themselves) – Ions (very common) When… • Do electrons flow – Wire – Metals • Do positive atoms flow – When you stick your hand in a light socket – Inside batteries Boiling water • The most common way to “make” electricity is to boil water. • This boiled water is steam that turns turbines. • Turning those turbines moves magnets. Conservation • Conserve electricity? – Electricity is not renewable nor nonrenewable – The stuff use to generate electricity is. • We convert other types of energy (gravitational potential energy, chemical energy, mechanical energy) into electrical energy Spin • Spin magnets inside a coil of wire and you have electricity (or spin the coil). – It’s that easy! • The tough part is making it spin fast and keep spinning. US • The top fuel to boil the water is coal – Nearly 50% of electricity generated in the US is by coal power stations. • Other: – Natural gas – Falling water – Nuclear fission – Wind – Solar – geothermal Now we have to move it • It’s very hard to “store” electricity. • We must move it from the power plant to your house. • William Stanley – transformer
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