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Racer Nuno (neonstranger)
Race Number 27
Date Thu, 12 Sep 2019 10:09:46 +0000
Speed 55 WPM Try to beat?
Accuracy 94.4%
Rank 1st place (out of 2)

Text typed:

Transformers and most electric motors operate on alternating current. In such devices the flux in the iron changes continuously both in value and direction. The magnetic domains are therefore oriented first in one direction, then the other, at a rate that depends upon the frequency.
Electrical Machines, Drives, and Power Systems (book) by Theodore Wildi (see stats)