アール (saidorrois)

Race #36

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Official speed 85.10 wpm (39.91 seconds elapsed during race)
Race Start November 4, 2019 11:38:07am UTC
Race Finish November 4, 2019 11:38:47am UTC
Outcome Win (1 of 2)
Accuracy 95.0%
Points 63.83
Text #4060102 (Length: 283 characters)

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.