The automatic windows in cars? Each window has its own motor. The tray on your DVD player? That's at least four magnets right there in one DVD player! What else in the home moves with electric motors? The ice dispenser in a fridge. The garbage disposal. A trash compactor. The spinning tray in a microwave in addition to the big magnet used in making the microwaves. Electric fans, the blower in a hair dryer, fans and blowers in a refrigerator.
A garage door opener. The pump in an aquarium. The rotating parts of washers and dryers. Blenders and mixers. The list goes on and on, and most of these motors have permanent magnets in them. Note: Not every electric motor has a permanent magnet in it. Some kinds of motors, like the electric induction motor , uses two coils of wire instead of a coil and a permanent magnet. The motor in my ShopVac is an induction motor, and does not use permanent magnets.
In a car, all sorts of things are controlled by motors: power windows, various pumps, windshield wipers and more. It happens twice, because when you release the button, the magnet passes underneath the piston and causes it to strike. Microwave magnets. Microwave ovens use magnetrons consisting of magnets to generate electromagnetic waves that heat food.
Refrigerator doors. Refrigerators and freezers are sealed with a magnetic mechanism so they are easy to open from the inside. Spice and knife rack. A magnetic spice rack with neodymium magnets is easy to make and useful for cleaning valuable counter space.
Also a knife rack is excellent for organizing kitchen utensils. Many cabinet doors are secured with magnetic latches against unintentional opening. Computers use magnets in a variety of ways. First, the hard drive's disk is covered with small magnets, which allow computers to store data.
Then, CRT computer screens are produced as television screens and, of course, use electromagnets. Organizing office supplies. Neodymium magnets are useful for organization. Metal office supplies such as clips and thumbtacks will stick to the magnet so they don't move. Extendable tables. Extendable tables with additional pieces can use magnets to hold the table in place. A pocket compass uses a magnetic needle to show which way is north.
Vacuum cleaners, blenders and washing machines all have electric motors that work by magnetic principles. Many computers use magnets to store data on hard drives. Magnets alter the direction of magnetic material on a hard disk in segments that then represent computer data.
The small speakers found in computers, televisions, and radios also use magnets; inside the speaker, a wire coil and magnet converts electronic signals into sound vibrations. Magnets offer many benefits to the industrial world. Magnets in electric generators turn mechanical energy into electricity, while some motors use magnets to convert electricity back into mechanical work. In recycling, electrically-powered magnets in cranes grab and move large pieces of metal, some weighing thousands of pounds.
Mines use magnetic sorting machines to separate useful metallic ores from crushed rock. In food processing, magnets remove small metal bits from grains and other food.
Farmers use magnets to catch pieces of metal that cows eat out in the field. However, the early Chinese are believed to have first used them in magnetic compasses for navigation purposes. Business Customers Our Blog Videos. Paying with Coins: Eddy Currents, Lasers, and Electromagnets Once your deposit your coins, the vending machine gets to work separating quarters, dimes, nickels, and pennies.
Paying with Cash: Magic Ink In the United States, paper currency is equipped with a myriad of anti-counterfeit measures like microprinting, raised print, watermarks, and even color-shifting ink. Paying with Credit Card : Tiny Magnets and Processors More modern vending machines accept credit cards, increasing the complexity of the process.
Categories: Magnet Facts.
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