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The simplest evidence that the Earth is not a permanent magnet is given by the fact of the polar wander. But more fundamentally, the interior of the Earth is far too hot for a magnet to retain its field.
Pierre Curie worked on many things, and the loss of magnetism at elevated temperatures was one of his discoveries, and is known as the Curie point for a magnetic material. Importantly, the material cannot contain a magnetic field above this point. Thus a transformer will lose its abilities above the Curie point of the (iron) laminations inside.
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Is magnetite a magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
Are permanent magnets are used in doorbells?
no it is not . a temporary magnet is used instead. If you use a permanent magnet, the doorbell will keep on ringing
Is the earth's core a giant magnet?
Earth's core is pretty much a dense, hot metallic sphere. It is hard because there has been so much pressure on it and heat. The outer core is indeed a magnet because scientists believe that it produces the earth's magnet field.
Is iron a permanent magnet?
Yes, as it is a magnet that will remain for a long time that makes it permanent. : ) x
What is the material used in permanent magnet?
ferromagnetic
An example of a permanent magnet?
An example of a permanent magnet would be the Earth. The Earth is one giant magnet with opposite poles.
Can the earth be a permanent magnet?
Yes
A permanent magnet can affect?
A permanent magnet can affect magnets and electromagnets.
What you an example of a permanent magnet?
The planet earth itself.
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 the magnet in a compass a permanent magnet or electronic?
A. Compasses typically use a permanent 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.
Is magnetite a temporary magnet?
No, it's a permanent magnet. It consists of an iron oxide, and iron is a permanent magnet.
What distinguishes a permanent magnet from a temporary magnet?
Permanent magnets do not lose their magnetic ability. Temporary magnets, however, gain magnetic properties when they are touched or moved by a permanent magnet. The properties of a temporary magnet dissipates over time after the permanent magnet is removed.
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.
Is a Refrigerator magnet a Permanent magnet?
yes
