How big do you think a magnet would have to be?
606554
Not that big!\n\nMagnetism is stronger than gravity by order of thousands.\nThe earths magnetic field is bigger and stronger than the earths gravitational field.\nMagnetism is stronger than gravity otherwise you would not be able to pick things up with a magnet
1135256
Conduction?  I'm not aware of magnets having such a property.
767003
a magnet would pick up the iron filings.
114658
Get a magnet and try it.\n\nRead the last sentence of the link below:
1142672
A few magnets will do the trick.... even a really large scientific one.
509341
never ever if they're a product of a single magnet! if they do, there will be a resultant magnetic field at that point which is quite probable(from more than one magnet)
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.
561277
MAGNET THATS POWERED BY ELECTRICITY
605330
well, if an object is moving, there must be some physical force applied to it - magnetic field, static electicity, pull from a sting, air pressure from a fan.
706168
We can shape magnetic fields to trap things, but those things must be moving charged particles.\n\nHumans are not magnetic and even a very strong magnetic field will not restrain them at all.
1092387
The closest magnetic source.
176943
2 inches? maybe?  I don't know, one so small that it can't penetrate.
135305
YES!  It's perfectly possible to _build_ such a car.  If the magnet is just attracting the car, it would pull forward on the car, and the car would pull back on the magnet.  Nothing moves.  If the magnet is attracted to an object ahead, the rig would move forward but would stop when the magnet got there.
564016
A magnet consists of molecular magnets.\nIf these magnets are arranged uniformly then the magnet will be stronger.\nIn an ordinary piece of iron there are molecular magnets, but since they are irregularly arranged there is no net magnetic field created.
866029
Strong and patented super magnets usually do not or never wear out and do not lose their magnetic charge so permanent use for a long period is guaranteed. Hard chromium coated magnets are known to be good.\n\nThere are also kinds of magnets  like an ordinary ceramic magnets which lose their magnetic charge with time or when exposed to heat. Just be careful in choosing the kind of magnet  itself.♥
105221
Well, the easiest way is to get some wire, wrap it around a iron/steel rod, and apply a current to the wire.\n\nTo get an electromagnet to have a lifting capacity that you specified, it will require a little more engineering work.  Trying to stay in the most basic terms, the power of your magnet will depend on how much current you put through the wire, how many turns you have around the iron rod, and something called the magnetic permeability of the iron rod.  Now there's some trade-offs with all of these factors.  More turns increases the magnet flux (strength), but requires more wire and increases the resistance.  More resistance means that you will need more current to counteract this problem.  Treating your electromagnet strictly as a resistor (which it is not), by following Ohm's law, you increase the current by increasing the voltage.   Too much current and you may end up melting your wire.   You want to keep the wire as small as possible so that you can get the turns as close as possible to your iron rod, but smaller wire has a higher resistance and lower current carrying capability.\n\nIt's a matter of balancing a lot of equations to get the best combination.  Your best bet is a little trial and error.
110961
you could sew flexible magnets into fabric. You may even be able to mount magnets into fabric like you would a button.  \n\nOK I GOTTA ASK... What are you making?