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A permanent magnet is a magnet which will keep its magnetism for a very long time and is difficult to change.
No, As I think a permanent magnet means they have abilities to hold the magnetism when they are magnetized. Such as Alnico permanent magnets, but in fact, they can be demagnetized,such as high temperature, hit each other,pulse waves, out magnetic field influence...What's more, different permanent magnetic material, have different abilities on holding magnetism,they can be used in different environments. you can find some details from some manufacturers website, to learn some knowledges.
Wiki User
∙ 8y ago
Wiki User
∙ 14y agoA permanent magnet will retain its magnetism unless it is affected by a strong outside magnetic or electrical force, or elevated temperatures. If they are not exposed to any of these conditions, permanent magnets will lose magnetism on their own, however this degradation is very slow, on the order of one percentage point every ten years or so.
Wiki User
∙ 13y agoA bar Magnet? It should be described as it's shape. Permanent Magnet or temporary Magnet ,they distinguished by their magnetism can be hold or not. Permanent magnet,as I know, there are some materials, Alnico,FeCrCo, Neodymiu,Ferrite, SmCo and others they have seldom seen. Their Hc (coercive force) are strong enough, that they are not so easy to lose magnetism after they magnetized. Temporary magnet, as I think, electromagnet or soft magnetic material should be temporary magnets.
Wiki User
∙ 7y agoPermanent magnets are those that keep their magnetism for a long period of time, without requiring the application of a current. Most permanent magnets are made from iron although some are made from different materials, but they all contain one or more of the naturally occurring magnetic materials.
Wiki User
∙ 12y agoyes,but it can loose it's property by heating,hammering and dropping
Wiki User
∙ 7y agoNo. Electromagnets are temporary magnets.
Wiki User
∙ 15y agotemporary
Wiki User
∙ 13y agoYes.
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What type of magnetism is present in a bar magnet?
The known magnetism in a bar magnet is electromagnetism.
What shape of a permanent magnet corresponds to the magnetic field formed by a solenoid?
The magnetic field produced by electric current in a solenoid coil is similar to that of a bar magnet.
Is magnetite a magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
If a magnet bar were heated would it change its magnetic field?
Initially, no. At a certain temperature the bar would suddenly lose its magnetism. This temperature is known as the Curie point of the material. If the magnetism of the bar came from an external source - a solenoid or a permanent magnet - the field would return to its original strength as soon as the bar cooled below the Curie point. If the bar had been itself a permanent magnet almost all the field would stay gone until the bar was re-magnetised by an external field.
Is a bar magnet a temporary magnet or not?
Yes, as long as their spins are aligned, they will attract other materials whose spins are aligned, be they temporary or permanent.
What type of magnetism is present in a bar magnet?
The known magnetism in a bar magnet is electromagnetism.
How are the uses of an electromagnet different from those of a permanent bar magnet?
A bar magnet is made from magnet materials and has a magnetic field at all times. An electromagnetic is not naturally magnet and only has a magnetic field when electricity is passed through it.
How do you know that is not a huge permanent magnet earths core?
1.because earth acts like a bar magnet and we had imagined that there is a magnet in earths core
Is a bar magnet a permanent?
yes,but it can loose it's property by heating,hammering and dropping
What are the similarities and differences between a solenoid and a bar magnet?
DIFFERENCE: a bar magnet is a permanent magnet where as solenoid is a electromagnet so it acts as a magnet only when electricity is passed through it. SIMILARITIES: they both act as magnets and both have a similar magnetic field.
Is the magnet in a compass a permanent magnet or electronic?
A. Compasses typically use a permanent magnet.
What shape of a permanent magnet corresponds to the magnetic field formed by a solenoid?
The magnetic field produced by electric current in a solenoid coil is similar to that of a bar magnet.
Is magnetite a magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
Is a needle in a compass a permanent magnet?
Yes, it is a permanent magnet.
If a magnet bar were heated would it change its magnetic field?
Initially, no. At a certain temperature the bar would suddenly lose its magnetism. This temperature is known as the Curie point of the material. If the magnetism of the bar came from an external source - a solenoid or a permanent magnet - the field would return to its original strength as soon as the bar cooled below the Curie point. If the bar had been itself a permanent magnet almost all the field would stay gone until the bar was re-magnetised by an external field.
Is magnetite a temporary magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
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.
