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Magnetism

Different Uses for Magnets
by

David Carrillo

on 29 April 2010

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Transcript of Magnetism

Different Uses For Magnets In Today's World Medicine Natural magnets have North and South Poles Like poles repel and opposite poles attract Magnetic field lines flow from North to South Natural magnets are made from Iron, Nickel, and Cobalt Magnets display magnetic characteristics Magnets have North and South poles. Like poles repel and different poles attract. Magnetic field lines flow from North to South. Natural magnets can only be made from Iron, Nickel, and Cobalt Magnetic substances can be induced by magnets to become magnets Astronomy Toys Electronics Navigation Using magnets, one can decrease the depolarization ability of the pain signal, thus slowing the pain signal. By placing the magnet over the afflicted area, some people have felt a reduction in pain almost instantly. One popular use of magnets today has been to treat various ailments of pain and discomfort, such as arthritis, tiredness, and shoulder and back pain An electric motor (like the ones used in a space shuttle) is all about magnets and magnetism: A motor uses magnets to create motion Speakers and microphones convert an alternating electrical signal into physical vibrations in order to create sound, or visa-versa Compasses are a great navigational tool The "north part" of the compass will always point to the "North" (Magnetic south) of the globe. Magnetix magnets are a fun toy to play with, and are really nothing more than simple magnets in different shapes. Works Cited
"HowStuffWorks "How Compasses Work"" Howstuffworks "Adventure" Web. 28 Apr. 2010. <http://adventure.howstuffworks.com/outdoor-activities/hiking/compass.htm>.
"HowStuffWorks "How Electric Motors Work"" Howstuffworks "Electronics" Web. 28 Apr. 2010. <http://electronics.howstuffworks.com/motor1.htm>.
"HowStuffWorks "How Speakers Work"" Howstuffworks "Electronics" Web. 29 Apr. 2010. <http://electronics.howstuffworks.com/speaker6.htm>.
"Magnetic Therapy." Vanderbilt University | Nashville, Tennessee. Web. 29 Apr. 2010. <http://www.vanderbilt.edu/AnS/psychology/health_psychology/magnet_therapy.html>. Opposites attract and likes repel. So if you have two bar magnets with their ends marked "north" and "south," then the north end of one magnet will attract the south end of the other. On the other hand, the north end of one magnet will repel the north end of the other (and similarly, south will repel south). Inside an electric motor, these attracting and repelling forces create rotational motion. Thus causeing the motor to generate electricity. When the electrical current flowing through the voice coil changes direction, the coil's polar orientation reverses. This changes the magnetic forces between the voice coil and the permanent magnet, moving the coil and attached diaphragm back and forth.
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