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What is Electromagnetic Induction?
Motors vs. Generators
The Electronics for Sale
Induction Cooktops - $300
The wires below the cook top run an AC current which disrupts the magnetic field between the wires and the cook top. The cook top, itself a conductor, produces and electric current which can be transferred into heat energy using the principal of resistance. The high electrical resistance of the cooking pots and pans generates heat enough to cook the food.
Graphics Tablet - $30
The AC current is generated in the tablet in both the vertical and horizontal directions. The magnetic field disturbance creates a current in the stylus which "talks back" to the tablet by means of its own magnetic field through the "opposite effect." The signals back and forth let the table know where the stylus is and the signal can then be sent to the computer for further direction of the signals to actually affect the display onscreen.
Hand Crank Laptop - $170
The crank on this laptop converts mechanical energy into electrical energy that can be stored in the laptop's batter and used to operate it. The crank rotates and electromagnet which disrupts the magnetic field via source movement. The disrupted field generates the electric current in the conductive metal in the laptop charging the battery.
Guitar Pickups - $13
As the guitar string is plucked, the magnetic field around it is vibrated. This causes a disturbance which is "picked up" by the pickups and is used to generate an electrical current in the pickup's coil. This is sent to through the wires to the amplifiers.
Electro-magnetized All-Purpose Tool - $37
This little wonder uses induction taking the electrical energy from its solar powered batter to produce a current strong enough to disrupt a magnetic field creating a large resultant current and causing specific charge differences in ordinary metallic objects. This allows it to work as a lock pick, screwdriver, soldering gun, or anything else you can imagine.
Electromagnetic Induction Speaker
This speaker system picks up on the vibrations of the phone placed on top of the speaker and amplifies the sound such that electromagnetic induction causes the sound to be louder than if it were just played through the phone.
What To Do Now?
Works Cited
- Gerbis, Nicholas. "How Induction Cooktops Work" 09 December 2009. HowStuffWorks.com. <http://home.howstuffworks.com/induction-cooktops.htm> 13 May 2013.
- Jessa, Tega. "Use of Electromagnets." Universe Today. N.p., 8 Sep 2009. Web. 13 May 2013. <http://www.universetoday.com/39295/uses-of-electromagnets/>.
- "Guitar Pickup."MagLab. Web. 2013. 13 May 2013. <http://www.magnet.fsu.edu/education/tutorials/java/guitarpickup/>
- Ostrovsky, Gene. "Treating Cancer with Electric Fields."medGadget. (2007): n. page. Web. 13 May. 2013.<http://www.medgadget.com/2007/08/treating_cancer_with_electric_fields.html>.
- Universal Induction Speaker. Youtube, 2013. Web. 13 May 2013. <http://www.youtube.com/watch?feature=player_embedded&v=g4qOFbVc2GA>.
- Vincenzo, . N.p.. Web. 13 May 2013. <http://www.drawing-factory.com/how-drawing-tablets-work.html >.
- Wohlgenannt, Markus. N.d. 0. n.p.