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You are probably talking about an electro magnet. For detailed explanations and some good drawings see the link on electromagnets here:
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Earn +20 ptsQ: Why is it a good idea to put an iron core in the magnet?
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Related questions
What c is the piece of iron inside a magnet?
core
Would a wooden core work to make a stronger magnet?
No, the core has to be a soft iron core.
What type of magnet has an iron core and electric current?
an electromagnet
What c is the piece of iron inside an electro magnet?
Core
Earth is what kind of magnet?
Its an electro-magnet - currents flowing through the iron core.
What characteristic of the earth makes its giant magnet?
the molten iron core
What characteristics of the earth make it a giant magnet?
the molten iron core
What charicteristic of the earth makes it a giant magnet?
Rotating iron core.
What characteristics of the Earth makes a giant magnet?
the molten iron core
When a current carrying wire is wrapped around an iron core what can it create?
a magnet
When a current -carrying wire wrapped around an iron core what can it create?
a magnet
Why earth has magnetic power?
This is a really simple answer, as I am only 10, but the Earth itself is a big magnet, as it has a a core of molten iron. The iron in the core, acts as a magnet and therefore, exerts its own magnetic field. Sorry it is so simple!
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