1. Spontaneous magnetization to the rescue of induction in electrical engineering
It can't be said often enough that without abundant materials with broad, spontaneous magnetization (J
s
), electrical engineering would no doubt have been sorely missed on earth... or at least would have become very cumbersome!
In fact, magnetic flux f is the magnetic magnitude for understanding the operation and sizing of any electrotechnical device. We have already seen that :
and
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