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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.
a permanent magnet has its domains arranged in one direction at all times and is thus able to exercise magnetic properties at all times, but it loses its magnetism if it is he…ated to a certain extent second way is to hammer it constantly. this disrupts the alignment of the domains (i.e. they are originally aligned in the same direction) and causes them to align in different directions thus destroying the magnetic behavior of the magnetic. If their microcrystalline structure or chemical composition change, they tend to no longer be magnetic.
You cannot magnetize a permanent magnet because it is already magnetized.
To make a magnet you can do it three ways. No1. Get a metal rod and wrap some Insulated copper wire around it. You can use some other wires but it might not work as well. Ma…ke sure the wire isn't too thick. Wrap the wire 50+ times. Connect the two ends of the wire to a battery. Don't connect it to a strong power source as it will get very hot very quickly. Now the iron rod now has become a weak permanent magnet. The more current you add to it the more stronger it will be and the longer you have the battery on the stronger it will be.. Also, don't drop it as it will lose it's magnetic properties. No2. Get a magnet. The stronger the better. Rub the magnet up a piece of metal then when you get to the end take the magnet off the metal and take it back to the start making sure the magnet doesn't touch the metal. I don't really like this method as it takes a long time to get the metal to pick up anything decent. No3. Get a magnet and let it stick to a piece of metal. The piece of metal will be weak but enough to make the needle on a compass move. (Don't ruin a compass. Mine point south-west and it shouldn't do that...)
Permanent magnetism is magnetism that is permanent. I think...
Under some conditions, sure. Impact and intense heat for instance can render a magnet weaker.
A magnet which doesn't lose it's magnetic effect when it's away from another magnet . Steel magnets are usually permanent magnets , while those made of iron lose their magneti…sm , as soon as the original magnet is held away . I simply mean that :- For example , when you use a magnet to attract a paperclip ( or a nail ) made of iron , and you attach a second paperclip to the first one , while still holding the first one to the magnet , the 2nd will still be held to the 1st . As soon as you remove the magnet , the magnetism between the 1st and the 2nd clips will be broken down , and they will fall down . But if you use nails ( or paperclips ) made of steel , the magnetism between the 1st and the 2nd nail will still be there , even if the original magnet is held away from the 1st .
Yes, maybe, but probably not. This is not the most common way of describing matters and the term "static magnet" does not have a defined meaning and established usage, so on…e can not know the meaning when there is no context. The other similar phase is "static magnetic field." One often uses the phase "static magnetic field" to refer to a magnetic field that does not change for a period of time. The source of that magnetic field can be anything and need not be a permanent magnet. The typical solenoid is designed to produce a magnetic field which is typically of fixed strength for a period of time. Such a field arises in an electromagnetic and not a permanent magnet, but is nonetheless a "static magnetic field."
The material from which the magnet is to be made is heated so that it is above what is called the curie temperature. The material is then allowed to cool in a magnetic field. …The magnetic field can be made by coiling wire and passing an electric current through it.
Heat or shock. Heating it past a certain point, or subjecting it to a hard mechanical shock will rearrange the magnetic domains so that they are no longer alligned. Also, an a…lternating magnetic field will neutralize a weaker magnet. The process is called "Degaussing". If you burn it.
yes,but it can loose it's property by heating,hammering and dropping
Inertia. A system will not change it's properties until an external force is applied. Permanent magnets DO decrease in strength by being used as they are subjected to external… magnetic fields that oppose them. How much a permanent magnet will be affected by the external field depends on it's Hysteresis loop characteristics.
Electromagnets possess a magnetic field that is a result of electrical current. When the current stops, the field will disappear also and hence we say that it is not permane…nt magnet. Magnetism is usually described as a result of one of three circumstances. It is a general law of physics that a magnetic field is created any time there is an electrical current. This is the way an electromagnet works. The so-called permanent magnets have a magnetic field that originates in the magnetic properties of the atoms that comprise the magnet and depends on the type and arrangement of the atoms. One can say the magnetism is a consequence of the material itself. Lastly, when electric fields are changing, such as in an AC circuit, magnetic fields are created as a consequence of the changing electric fields. This too is one of the basic laws of electromagnetic theory and a law of nature. This is not an effect that is easy to see, even in a laboratory setting, but it has important consequences which would take an explanation that goes outside of the topic of the current question.
Permanent 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.