Many electromagnets have an advantage over permanent magnets because they can be easily turned on and off, and increasing or decreasing the amount of electricity flowing around the core can control their strength. Electronics Modern technology relies heavily on electromagnets to store information using m...
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Electricity powers our world and our bodies. Harnessing its energy is both the domain of imagined sorcery and humdrum, everyday life -- from Emperor Palpatine toasting Luke Skywalker, to the simple act of ejecting the "Star Wars" disc from your PC. Despite our familiarity with its effects,...
To learn more about the technology involved, read How Electric Motors Work and How Electromagnets Work.Making Electricity Niagara Falls: It has beauty and whole lot of kinetic energy that we like to put to use for hydroelectric power. Stockbyte/Thinkstock In Michael Faraday's generator, ...
If you've read How Electromagnets Work, you know that an electrical current moving through a wire creates a magnetic field. Moving electrical charges are responsible for the magnetic field in permanent magnets as well. But a magnet's field doesn't come from a large current traveling through ...
By themselves, electromagnets are useful things. You can use them to pick up metal objects, carry the objects somewhere and then drop them by just turning off the power. For example, roofers use them to pick up nails that have fallen by accident into a homeowner's yard. And wrecking yards...
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HowStuffWorks To understand how an electric motor works, the key is to understand how the electromagnet works. (See How Electromagnets Work for complete details.) An electromagnet is the basis of an electric motor. Say that you created a simple electromagnet by wrapping 100 loops of wire around...
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