The performance of a permanent magnet is defined by several parameters. These allow us to judge not only the quality of the magnet, but also its "reaction" in a known environment.
The energy product of a magnet is the product of the remanent induction B
R
and the coercive field H
c
. This quantity enables the designer to choose the magnet best suited to his system, as it defines the magnet's optimum working point.
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