root (1_root_1)

Race #384

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Official speed 72.87 wpm (46.60 seconds elapsed during race)
Race Start January 10, 2019 12:04:46am UTC
Race Finish January 10, 2019 12:05:33am UTC
Outcome Win (1 of 5)
Opponents 2. chamrouenkit (61.31 wpm)
Accuracy 95.0%
Points 54.65
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.