Both- electromagnets are man made and regular magnets are natural. In natural magnets, in every atom of the metal, electrons are all spinning around the atom, but they also rotate (Like many earths around the sun). Since all of the electrons that revolve around the atom rotate in the same direction, they build up charges (magnetic charges) at each end of the metal. This results in a positive and negative pole per magnetic metal. In electromagnets (man made) an electrical current is added to an otherwise inactive metal and the same process happens, but must be sustained by a constant electrical current.
2007-06-26 04:12:48
·
answer #1
·
answered by fangfarris 2
·
0⤊
1⤋
All magnets at room temperature involve iron, cobalt, or nickel, with iron being the most magnetic. (There are other substances that are magnetic at odd properties. When hydrogen is a solid, for example, it is magnetic. Who cares? It's not something you'll find sticking to the fridge.) If you look at a periodic table -- http://periodic.lanl.gov/default.htm -- you will see that these are in the same series, VIII.
Magnetism has to do with the way that the electrons line up in the electron shell. Each atom of iron is a tiny magnet. A lump of iron is not magnetic, however, because the atoms are all jumbled around. But if you heat it and allow it to cool slowly in a magnetic field, the tiny magnets inside will each align, and add their effect together to create a magnetic field.
Some magnets are manmade. Wrapping a wire around an iron core and running a direct current through it will create an electromagnet. These are always manmade. It is also possible to create more permanent magnet. If you take a straight pin and lay it across the legs of a horseshoe magnet for a long time, it will become magnetic in its own right. You can speed this process by heating the needle, but we are talking about temperatures almost high enough to melt the metal, not something you could do at home. These are how bar and horseshoe magnets are made.
There are some minerals that are naturally magnetic. Lodestone is the most well known. It was used in compasses long before anyone understood what was going on to make the thing point north. Magnetic minerals usually have a lot of iron. Hematite is one, at 67% iron. Hematite forms either in standing water like in hot springs (forms slowly in heat) or in volcanoes (lots of heat). This allows the atoms to line up and form a magnet.
2007-06-26 05:10:30
·
answer #2
·
answered by TychaBrahe 7
·
0⤊
1⤋
Man Made Magnets
2016-12-12 08:29:01
·
answer #3
·
answered by ikramuddin 4
·
0⤊
0⤋
This Site Might Help You.
RE:
Are magnets manmade or natural, and what makes a magnet?
2015-08-12 23:33:40
·
answer #4
·
answered by ? 1
·
0⤊
0⤋
Magnets come in both varieties. Ferrous metals contain many mini magnets within their shape, tapping on one end of the piece of ferrous material will have the effect of aligning these mini magnets and increasing the overall strength of the magnet.
2007-06-29 05:56:25
·
answer #5
·
answered by johnandeileen2000 7
·
0⤊
0⤋
A magnet is a collection of net polarized angular momenta of charged particles. Electron spin angular momentum gets you Alnico (94% of the field). Electron orbital angular momentum gets you Sm_2 Co_17 (37% of field). You can have polarized nuclear spins, too, but the net field is too weak to self-order.
Current flowing through a loop gets you electromagnetism (ampere-turns). That is also summed angular momenta.
Magnetite, Fe_3 O_4, is a naturally magnetic rock. Take a rod of soft iron. Align it north to south. Bang one end with a hammer a few times. You now have a (weak) magnet.
2007-06-26 04:36:19
·
answer #6
·
answered by Uncle Al 5
·
0⤊
2⤋
there are man made magnets and naturally made magnet. An example naturally made magnets are magnetites(a kind of rock).
2007-06-26 04:09:44
·
answer #7
·
answered by lilmaninbigpants 3
·
0⤊
1⤋
--->> Tips---> https://trimurl.im/f61/are-magnets-manmade-or-natural-and-what-makes-a-magnet
2015-08-04 07:30:03
·
answer #8
·
answered by Anonymous
·
0⤊
0⤋
Ha Ha . That & computer screens . Use glasses just to see through the dust thats collected overnight on this screen * smiles * Happy Eve , Sawman . D :)
2016-03-22 13:28:34
·
answer #9
·
answered by Elaine 4
·
0⤊
0⤋