According to this law, there's a fixedĪmount of energy in the universe and some good news and some bad newsĪbout what we can do with it. Where are you going to get that from? There's a basic law of physicsĬalled the conservation of energy that explains how you can getĮnergy-and how you can't. You need to feed it a steady supply of electrical energy. The best way to understand electricity is to start by giving it Highsmith Archive, Library of Congress, Prints and Photographs Division. Photo: A diesel electricity generator from the mid-20th century, pictured at the REA Power Plant Museum near Hampton, Iowa. ![]() Let's take a closer look at generators and find out how they work! Working in reverse that converts ordinary energy into electricity. Power possible-and indeed practical-is a superb electromagneticĭevice called an electricity generator: a kind of electric motor It days, weeks, months, or even years later. One place and use it on the other side of the world if you want to.Īnd, once you've produced it, you can store it in batteries and use ![]() You can produce it in all kinds of different ways using everything from coal and oil to wind and waves. ![]() Modern homes are powered mostly by electricityĪnd it won't be long before most of us are driving electric cars as well. Oil may be the world's favorite fuel, but not for much longer.
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