Shaping Magnetic Fields
Name: David S.
Is it possible to concentrate/focus/channel a magnets
magnetic field into a single, straightforward direction?
You can guide the field of a magnet with metals such as aluminum or copper.
The field will tend to remain within the metal. One example of this is the
core metal used within transformers. Regardless of how you set things up,
however, the field does eventually have to curl back to the other end of the
magnet. All magnetic fields form complete loops. You can use cores and
other magnets to make the field straight within a certain space, but not
Dr. Ken Mellendorf
It is possible to concentrate the magnetic field between two poles of a
magnet but it is not possible to send the magnetic field, in a confined
beam, out into free space.
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Update: June 2012