does the sahpe of a magnet affect it's strength?
145168
Actually the shape of a magnet doesn't affect to the its strengh because strengh of a magnet is more powerful than  its shape.
1161474
You can't. The polarity of a magnet is set. If you screw it up, sorry!
764447
It depends on how powerful a magnet you use. To get a magnet to perform all of those tasks, it will need to be a really powerful one.
35844
Log on to http://en.wikipedia.org/wiki/Magnet\n\nand check out Characteristics of magnetic materials
561277
MAGNET THATS POWERED BY ELECTRICITY
1097908
Iron, cobalt and nickel can be magnetic. They can be made to have polarity. Poles that are alike repel and poles which are not alike attract. A magnet will attract all of them if they are not polarized. If they are polarized, a magnet will attract or repel according to the polarity.\n;-D
163136
Yes, eggs are much stronger if the force is applied from the ends than from the sides. And they are USUALLY (though not always) stronger if the force is applied from the narrow end  rather than the broad end.
101591
See if it is attracted to a magnet?
80341
regular magnets are natraly magnitised, they maintain their magnetic properties with out aid of an outside force\nelectro magnets use a coil of wire, with a curent passing through it, wraped around a piece of metal to create the magnitism. when you remove the curent, it loses its magnetism.
56086
Depending upon your application, copper probably does not make a good coil core.  If you wrap many turns of wire around a steel nail and pass a current through the wire (say from a battery) the nail will concentrate the magnetic field and you will have an electromagnet in which the tiny magnets within the steel are all aligned.  This will not happen with copper because you can not pick up copper with a magnet.  The coil will still produce a magnetic field but the copper core will not concentrate it.
1092759
I had the same problem when I learned about both of them. \nBut now think of it in a different way. You are assuming that the magnetic FORCE that magnets have on certain metals. But if you think about it carefully they don't create or destroy energy. \nIf you don't beleive me consider a piece of iron with only gravity working on. But its height is 0 so it has no Potential or Kinetic energy. But now let's say you bring in a magnet. Now naturally that will make the iron bar rise and stick to the magnet. Now a natural assumption would be that you just created potential energy because the height of the iron bar just increased. But now you have to consider the fact that magnet is still putting some force on the Iron bar. So no change in potential energy occured. No change in Kinetic energy occured once the bar stuck to it. and the Energy needed to bring the bar up could be accounted by the energy needed to bring iron bar in. This shows that there was no energy created.  \nI think that you are trying to overthink the problem. I think this should help good luck.
1180717
It truly depends on the amount of Iron in the magnet as to the strength and the base material that it is made of.  Some of those cheap rubbery refrigerator magnets will deteriorate or dry rot over a period of years and thus lose it's quality.  \n\nHow ever a good solid high iron ore magnet will easily out live you.  (with proper care)
91676
I answered your question already.  Magnetic field strength is governed by amount of current flow.
192992
Kind of.  The more electrons/protons, the stronger the pull.  The stronger the electromagnetic pull, the tighter the atom will be.
1052987
All of the above.\n\nActually even Magnetism is affected by heat.  Heat a magnet and it will lose its magnetism.\n\nChemical composition will also change.
12610
Nope.  They better not.  That would be the worst.  We still say "pole strength" because bar magnets have poles.  Monopole would mean just a north or south pole alone, which doesn't happen. Dipoles, quadrupoles, and the like are in abundance, so "pole" is still a good word.
361293
Do you mean "magnetic"?????