give some fun facts about electromagnet?
402683
Electro-magnets use electricity to temporarily align all of the atoms in a ferrous material to a N-S position. When the electricity is turned off, the atoms return to their original misaligned state, losing much of its magnetivity. It never completely loses all of it, as some atoms will remain in the alligned state, creating a "Gauss" feild around it.
731450
Faraday's law of Electromagnetic induction: refer http://en.wikipedia.org/wiki/Electromagnetic_induction\n\nThermodynamic processes: refer http://en.wikipedia.org/wiki/Thermodynamics
472476
You need something iron (like a nail) wrap the wire around to make an electromagnet. You could wrap the wood lengthways with some wire and then wrap another wire shortways around the assembly and hook to the battery but an iron core is much better. \n http://www.energyquest.ca.gov/projects/electromagnet.html\nBTW You do have most of the parts to make a simple radio receiver also.
805479
Get two pieces of iron block. Turn a coil round one of them. Pass electric current through the one which has the coil turned round it. This will make the coiled piece of iron act like a magnet and will attract the other piece of iron. And you have made an electromagnet.
907372
A magnet whose magnetic properties is dependent on current flow.
209289
start here:\nhttp://en.wikipedia.org/wiki/Magnet
278267
One of the neatest things you can do is to show people what a magnetic field looks like. The only difficult part is that you need some iron filings. It doesn't take a lot; a teaspoon or so is enough. Find a piece of scrap iron, put it in a vise, and file it with a fairly fine file until you collect what you need. (You can use a magnet to collect the filings, but choose one that's easy to clean off like a flat one, because they do stick.)\nNext take a piece of poster board and glue some magnets to it. If the board has only one white side, glue the magnets to the non-white side. Pick a variety, like horseshoe, ring and bar magnets. Now turn the board over and sprinkle the filings sparingly on the white side. You'll see the "lines of force" that define the field. They'll be in interesting patterns. Try not to let the filings get under the board and stuck on the magnets. That's it!
182140
i'M IN SIXTH GRADE, AND A GOOD SCIENCE FAIR TOPIC WOULD BE "WHICH SUBSTANCE CONDUCTS ELECTRICITY BEST". iT IS REALLY EASY TO DO AND YOU CAN HAVE LOTS OF GRAPHS. FOR EXAMPLE I HAVE 21 GRAPHS. AND MY WHOLE ENTIRE BOOK IS 93 PAGES LONG. \n\nHOPE i HELP YA!!
669781
Magnetic property of a material is due to the arrangement of Domains in it. If you are not of science background, simply think it as it is the arrangement of atoms of the material, which is responsible for its magnetism. If you provide a permanent magnet with electric supply, the arrangement of atoms in it will be disturbed resulting in loss or decrease in its magnetism.\nNot only the electric supply, but heating or even strong jerks can also lead to the disturbed atomic arrangement and therefore decreased or completely lost magnetism.
805978
Not sure what three things you're looking for, but here are three good ones:\n1. lots of windings\n2. high current\n3. an iron core
1045884
http://en.wikipedia.org/wiki/Magnets\n\ngo there if u wanna find out, i only know simple version...
207863
see:\nhttp://en.wikipedia.org/wiki/EngineerIng
441909
If you get an A with this work please share it with me. If you get an F , forget me.\n\n  \n  Magnetism are 2 sides (+ and -) (like in some relations). Every compass will go to the North because of magentic fields, those fileds are kind of circles like the air waves of radio or Tv.\n\n  2. Electromagentic is a toold like iron that needs electricity to work and work as a magnet, it is important a battery or other source of low voltage. Electromagentics are used to attract old cars, electromagentics are used for people who lost some things on the sand (those kind of electromagnetics are the ones with one circle in the end where the person is attracting something).\n\n 3: Electromagentic needs a switch like light, turn on and off, you let the energy flow and you get the magnetic field or you deny that flow, on the other hand the magnet is always "on", there are magnets where both sides are positive or negative, most of them are positive and negative like in electricity you need both to have electricity.\n\n 4:For instance the motor of one car, inside the motor you will see a lot of pieces and is kind of interesting because thin cables are allowing the flow of electricity, so with that in mind the motor is moving, produces energy then
815673
OK I'm cheating - I put this answer up a little while ago.\n\nA quick and dirty idea for a physics project would be one based on electromagnetism. Without knowing what grade you're targeting, a simple one that has a fair amount of pizzazz is to build a gauss rifle. Checkout http://sci-toys.com/scitoys/scitoys/magnets/gauss.html\n\nThe sci-toys site has some other pretty cool stuff that you might find useful as well.\n\nFor a more advanced example, you can make a small rail gun that applies similar principles but can have a much larger kick. Just do a search on "rail gun experiment".\n\nEnjoy!!
102674
Electromagnetism is the what allows information contained in electric circuits to actually leave the circuits. Althought he technique by which the information (electric signal) actually leaves the circuit is quite complicated, suffice it to say, that using an antenna, this information can be allowed to travel through air.\nCo-incidentally, even light happens to be an electromagntetic wave. So, you can say that human beings owe their vision to electromagnetism.\n\nMircowaves - an electromagnetic phenomenon allow you to exhange information with satellites, besides of course, allowing you to cook food.\n\nThink about it! Radio, Mobile phone communication etc. all owes its existence to electromagnetism.\n\nThis is course is with respect to electromagnetic wave phenomeona. When you actually think about the fact that one can create artificial magnetics using electric current, the possibilities are limitless
1051252
Electrons are outside the nucleus of an atom and spin-random.Electrons are negative. [All matter has electrons (for the sake of agument)]\n\nMagnets-the 2 poles-electrons spinning in one direction at one end and the other direction at the other end.Positve and negative.\n\nElectricity-electrons travelling along a wire from the source like a chain reaction bumping the electron to electron ( current) to its final destination.\n\nMedical (diagnositc) xray production-a low voltage current is applied inside the xray machine-which causes the loss of electrons off a wire, these "free electons"(in a vacuum)negatively charged then travel high speed across inside the vacuum tube to a positive "plate". When the electrons hit this plate, their energy ends with the release of an x-ray.\n \nAn MRI (Magnet Resonance Imaging)of a person-a powerful magnet lines up the electrons of a persons body. When the magnet is turned off-the release of the electrons to again begin their spinning releases an xray from the persons's body.\n\nElectomagnet-a magnet wound with coil which when current is applied increases the magnetism. Example of how junk cars are picked up -electric current running around the magnet, magnet picks up car,car is moved to the top of the heap and the current turned off-boom-no more magnet-car drops.\n\nYou can make a magnet with electricity and electricity with a magnet.\n\nElectronics involve use of electrons. Remember they are free spinning little boogers. \n\nMagnets temporarily interfere with the spin of the electrons.
325774
http://en.wikipedia.org/wiki/Physics