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it depends on how strong the electromagnet is. you basically choose how powerful to make an electromagnet when your designing one. one used for picking up cars at a junk yard is gonna be more powerful than one used in a kitchen appliance.
and "normal magnet's" is not a good term for all other types of magnets. there are lots of different types of materials that can be magnetized, all of them are stronger or weaker then the others, all of them can also be made to different strengths, and all of them lose strength over time.
the usefulness of an electromagnet is that they can be turned on and off depending on whether or not they have electricity running through them.
http://en.wikipedia.org/wiki/Magnet
What else can I help you with?
Is a bar magnet stronger than a you shaped magnet?
Not necessarily.
What are the benefits of using an electromagnet rather than a bar manet?
An electro-magnet can be switched on & off - a bar magnet is 'permanent' Think of a scrap-yard. If the magnet they use to pick up huge quantities of metal were permanent, they'd have to manually remove every piece. With an electro-magnet, they simply turn the power on to pick up a load, and off when they want to release it. You can make your own electro-magnet with a battery, some wire and a large nail.
Why would a bar magnet pick up more paper clips than an eletromagnet?
?? lol i dont know what electro magnets u have been using! if it is a homemade electro magnet, try increasing the coils in the wire ro the power u are putting into it. does the bar magnet (permanent magnet) have a larger surface area than the electro one? also, you do know that the magnetic potential of electro and permanent magnets vary right? they use electro magnets in junk yards that are capable of lifting scrap cars with eaaase
Why is an electro magnet better than a normal magnet?
An electromagnet is made by wrapping coiled wire around a piece of metal. When a current is applied, it creates a magetic field. The main advantage is that an electromagnet can be turned off by breaking the circuit. That's how those big magnet cranes at junkyards can let go of the metal. You can easily make a fun electromagnet project that kids love. Just coil a wire around a bolt, and hook up the ends to both sides of a battery. A 6 volt flashlight battery works great. More coils means a stronger magnet.
Are bar magnets stronger than electro magnets?
Yes, because electromagnets can lose their magnetism.
Do some places on a magnet have a stronger force than other places?
no
Why will an electromagnet be able to pick up more steel cans than a permanent magnet?
An electromagnet is a stronger magnet.
Is the south pole of a magnet stronger than the north pole?
Not if the magnet is symmetrical, and you define 'strength' in terms of flux density.Yes because it has a stronger attraction rate.there is no stronger or weaker for a magnet
A bar magnet's pull is strongest?
No, electromagnets are stronger than bar magnets.
Is the north -seeking pole of a magnet stronger than the south-seeking pole?
No, they are of exactly equal strength. If it were possible to construct a magnet where one pole was stronger than the other, it would be a violation of one of Maxwell's laws (specifically, div B = 0).
Can a magnet delete everything on a computer by just putting it on the outside?
No. A magnet only interfers with magnetic fields ... lots of old IBMs used magnetic memory cards and that's where the stories started. It might erase a floppy disk, but an electro-magnet does the job much better than a perminant magnet.
How much stronger are MRI systems compared to a refrigerator magnet?
MRI systems are significantly stronger than refrigerator magnets, with MRI systems typically having magnetic fields thousands of times stronger than refrigerator magnets.
