In the photo we see a ferrite ring magnet, with ownership of the two poles, beside this the inductor, and then we coupled inductor magnet.
In this last photo above Imam has added a piece of metal (inductor). The great advantage of these magnets is that the field that is generated when the inductor is placed in the center, in the hole, is much more intense.
As the field is very intense it is recommended to be very careful when applying them in the body.
A magnet with inductor is used only on one side, the side that has a nucleus in the center, on the opposite side of the magnet polarity is decreased.
The core has all the electrons that leave the face and the polarity aligned and sends it to the central point out the other side.
The polarity is regarded as correct or "boss" is protruding from the center of the magnet with the inductor.
Although actually has two polarities, North abroad one another with greater power and SUR (which is king) in the center, so everything is lined red color representing SOUTH polarity.
These magnets have the benefit of having magnetic field or double post.
From : http://qisomamedicina.blogspot.com/2011/04/los-imanes-con-inductor.html
