0
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 permanent 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.
What else can I help you with?
Is the magnet in a compass a permanent magnet or electronic?
A. Compasses typically use a permanent magnet.
Is a needle in a compass a permanent magnet?
Yes, it is a permanent magnet.
Is magnetite a temporary magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
Is the magnet in a compass a permanent magnetic or an electromagnet?
PermanentThere is no source of current in a compass, therefore the magnet is a permanent magnet.
How can a magnet be temporarily magnetized when attached to a permanent magnet?
When a magnet is attached to a permanent magnet, it can become temporarily magnetized by aligning its magnetic domains with the strong magnetic field of the permanent magnet. This alignment causes the magnet to exhibit magnetic properties for a short period of time.
Is the magnet in a compass a permanent or electromagnet?
The magnet in a compass is a permanent magnet. It retains its magnetism without the need for an external electrical current.
Is a permanent magnet called a hard magnet or a electromagnet?
Perminant magnet
Is magnetite a magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
Is the magnet in a compass a permanent magnet or a electromagnet?
It is a permanent magnet. Electromagnets(as the name suggests) requires an electric source to become a magnet, when the power source is turned off it will not function as a magnet.
What kind of magnet is the domain remains aligned?
A permanent magnet.
How can i do permanent magnet?
eBay
A permanent magnet can affect?
A permanent magnet can affect magnets and electromagnets.
