Magnet

A magnet is an object that has a magnetic field. The word magnet comes from the Greek "magnítis líthos" (μαγνήτης λίθος), which means "magnesian stone". Magnesia is an area in Greece (Now Manisa, Turkey ) where deposits of magnetite have been discovered since antiquity.

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In the modern sense, a magnet is any material that has a magnetic field. It can be in the form of a permanent magnet or an electromagnet. Permanent magnets do not rely upon outside influences to generate their field. Electromagnets rely upon electric current to generate a magnetic field--when the current increases, so does the field. Magnets are attracted to or repelled by other things. If a magnet is strongly attracted to something, then that something is said to have a high permeability. Iron and steel are two examples of materials with very high permeability, and they are strongly attracted to magnets. Liquid oxygen is an example of something with a low permeability, and it is only weakly attracted to a magnetic field. Water has such a low permeability that it is actually repelled by magnetic fields. Everything has a measurable permeability: people, air and even the vacuum of space.

Magnetic field: :For other senses of this term, see magnetic field (disambiguation)....

Greek: The noun Greek refers to:...

Magnesia: :This article is about the region of Greece. For other meanings, see Magnesia (disambiguation)...

Magnet related Images and Photos (experimental)

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