4 What is electricity?Electricity is the flow of electrons from negative to positive
5 How did we discover electricity? Many people think Benjamin Franklin discovered electricity with his famous kite-flying experiments in 1752, but electricity was not discovered all at once.
6 Discovery of Electricity In 1800, Alessandro Volta, an Italian scientist, created the first batteryWhat is a battery?Device that can convert stored chemical energy into electricityIn 1800, Alessandro Volta, an Italian scientist, soaked paper in salt water, placed zinc and copper on opposite sides of the paperThe reaction created electricityVolta had created the first electric cell.By connecting many of these cells together, Volta was able to “string a current” and create a battery.
7 The First Electric Generator 1821: Michael Faraday was the first one to realize that an electric current could be produced by passing a magnet through a copper wirethis was the first generator
8 Electricity for Everyone 1879: Thomas Edison invents the light bulb1882: He designs and builds the first electric power plantHow we get our electricity today
10 How much would that cost? If they used 200 kWhr in 1/7 secAt a cost of .1 $/kWhr for 12 hours$ = 200 kWhr x 12hrs x 3600s x $ s hr kWhr= $508,235/ night
11 How do we generate electricity? Burn something: coal, natural gas, oil, “Nuclear Fuel”Heat waterSteam turns a turbine (fan)Turbine spins an electric generatorThese steps generate the MAJORITY of the electricity we use.
12 Generating Electricity Why does he wear a metal suit?What are the 3 things he is afraid of?
13 Electric Generator Function In a power plant the spinning of magnet relative to a coil of copper wire generates electricity
14 Electrical Generation Which spins in a hydroelectric power plant generator, the magnet or the coil of wire?What do they do to the voltage before they deliver electricity to the home?
15 Electricity Generation CO2 & othersFuels: Coal,Oil,Natural gasFire