Electromagnets

634 Words2 Pages

Electromagnets are used for anti-shoplifting systems, junkyard pick up magnets, TV’s, loud speakers, and other devices. They are used to pick up heavy loads of metal, detect metals in tags for shoplifters, TV’s, and speakers. An electromagnet’s power in attracting other metals depends on the strength of the coil (solenoids), the electricity source provided to power the electromagnet, and size of the nail.
Electromagnets are magnets that use electricity for a magnetic field connected to the coil. The coil surrounds the core, which is normally steel or iron, that makes the electromagnet.
The solenoid of an electromagnet is the wire or coil that directs the electricity to power the magnet. The coil is creates the magnetic field for the magnet. Since the solenoid creates the magnetic field it powers the magnet to pick up other metals. The magnetic force depends on how many times the coil is wrapped around. The more the coil is wrapped around the higher the magnetic fields strength is. The magnetic field runs mainly through the coil and is weak outside of the coil. The current of the magnetic field is always moving if a power source is connected to it.
The direction of the coil should start at the top of the nail and work down to the bottom. The direction doesnt really matter as long as you go from top to bottom. You can find out the direction of the coil by putting a compass by it. The compass hand moves when you put it by the magnet because of the magnetic field. The magnetic field and the nail make the compass's hand move by finding the north and south poles. The direction of the coil can't necessarily help it. The number of turns in the coil help the magnetic field. The more the coil is turned the higher the magnetic flux dens...

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...intsec=frontcover&dq=electromagnets&hl=en&sa=X&ei=YbWLUsupBui8igKls4HoBw&ved=0CFIQ6AEwAw#v=onepage&q=electromagnets&f=false http://www.howmagnetswork.com/Electromagnetism.html http://www.universetoday.com/39295/uses-of-electromagnets/ http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html http://www.ehow.com/about_4703546_what-electromagnets-used-everyday-life.html http://www.studyphysics.ca/30/Solenoidelectro.pdf http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p035.shtml http://books.google.com/books?id=YbAIAAAAIAAJ&printsec=frontcover&dq=electromagnets&hl=en&sa=X&ei=OhyFUsHRE6OpiQLq9IGQBA&ved=0CEQQ6AEwAA#v=onepage&q=electromagnets&f=false http://www.pa.msu.edu/courses/1997spring/phy232/lectures/ampereslaw/solenoid.html http://farside.ph.utexas.edu/teaching/302l/lectures/node76.html http://education.jlab.org/qa/electromagnet_03.html

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