He was also the first to discover that magnets have poles, or individual points where the charge is focused. And, important for electromagnetism, Maxwell observed that when a current passes through a wire, it generates a magnetic field around the wire. Hans Christian Oersted Maxwell's work was...
magnet is any object that has a magnetic field. It attracts ferrous objects like pieces of iron, steel, nickel and cobalt. In the early days, the Greeks observed that the naturally occurring 'lodestone' attracted iron pieces. From that day onwards began the journey into the discovery of magn...
How Odometers Work How Fuel Gauges Work How Gear Ratios Work How Car Computers Work How does a speedometer in an airplane work? How Magnets Work Sources “100 Years of Speedometers — The History of Driver Information,” November 7, 2002. Found online at: http://www.siemensvdo.com/press...
(For a full explanation of how it works, please see our detailed article on light.) Refraction is the key to how lenses work—and lenses are the key to binoculars, telescopes, and glasses. But how do we get from light bending in water to a cool pair of binoculars that let us study ...
Photo: Magnets—the technology behind hard drives really is this simple!Magnetism has another very important use. Suppose you need to leave a message for a friend and all you have is a magnet and an unmagnetized iron nail. Suppose the message is a very simple one: either you will see ...
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Generators - As the turbine blades turn, so do a series of magnets inside the generator. Giant magnets rotate past copper coils, producing alternating current (AC) by moving electrons. (You'll learn more about how the generator works later.) Transformer - The transformer inside the powerhouse ...
a microphone is a device that converts sound waves into an electrical signal. it allows you to capture audio and transmit it to various devices, such as computers, amplifiers, or recording equipment. how does a microphone work? a microphone consists of a diaphragm, a coil or capacitor, and...
Not only did this revolutionize the music industry, practically killing off the cassette and vinyl markets, but also the budding computer industry. Early floppy disks had limited storage capacity and could lose data if exposed to magnets. Compact discs stored information in an optical format and co...
This could be either an old computer used as if it's a file server or if you use two or more computers in daily life, by setting up folders that can be shared and viewable by the other desktop. Getting this set up can be a bit of a chore, but once done, it will beco...