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An electromagnet only retains major magnetic properties when a current is being run through it.
Answer
Whether a material makes a permanent or temporary magnet depends on the nature of the ferromagnetic material involved. For example a coil with a steel core will retain much of its magnetic flux density when the current is switched off, whereas a coil with an iron core will lose most of its magnetic flux density when the current is switched off.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoThe planet Earth may seem to be a "permanent" magnet, but the shifting of its magnetic poles indicates that it is not. The Earth's magnetic field is caused by the spinning of its iron-nickel core (which is partly molten).
"Permanent magnets" are composed of metallic particles aligned so that they will adhere to materials in which a similar alignment can occur. Although the Earth contains many permanent magnets, it is not one in itself.
Wiki User
∙ 6y agoEarth's magnetic field will be around long after we are gone, but it is not a permanent magnet in the conventional sense. A permanent magnet owes its field due to magnetic particles within it be aligned with one another. Earth's magnetic field is the result of currents in the molten outer portion of its metallic core. This magnetic field changes over the course of hundreds to millions of years.
Wiki User
∙ 13y agowhy can't i find the answer i need it for school and it is due tommarrow
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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
What Extends from earths core to earths crusts?
idek what 2 say???
Is the earths core cooler than the crust and mantle?
No, the core is hotter.
Is the earths outer core made out of basalt or granite?
No. its the inner core!
Is Venus a permanent magnet?
No.-----The earth has an important magnetic field.No, Earth would lose its magnetic field if its molten iron core were not moving. Scientists speculate that Mars had a magnetic field a long time ago but lost it when the planet cooled to the point that its core solidified.
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
How do you know that there is not a huge permanent magnet at the earths core?
For one, the magnetic field changes continuously; this is not consistent with a permanent magnet.
What has an electromagnet in it?
a school bell, the earths core and a junkyard magnet
What has electromagnets in it?
a school bell, the earths core and a junkyard magnet
Type of magnet?
There are two main types of magnet - Permanent and electromagnet. Electromagnets are usually in the form of a coil wound around an iron core. When current passes through the coil the core becomes magnetic. A permanent magnet is made of a material that naturally exhibits magnetic properties.
What is a non permanent magnet?
An electromagnet (a coil around a soft iron core) will only be magnetic when current changes in the coil and so is not permanent.
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.
Are you closer to the earths core or moons surface when standing at sea level?
Earth's core
What makes the permanent magnet create its field?
I believe the earth's core creates friction as it the earth rotates and that generates the field. Not 100% on that though.
The possible source of earths magnetic core is?
The molten iron and medals inside the earths core are the reasons for the earths magnetic core.
Why should the core of an electromagnet not be made from steel?
because the steel would become a permanent magnet and not let go of the metal it was holding. =) hope this helps!
Is there a bunny in the earths core?
no it is not true. there is solid iron and nickel in the Earths core
