Erik (eriklf)

Race #32

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Official speed 42.22 wpm (80.44 seconds elapsed during race)
Race Start August 25, 2020 12:23:02am UTC
Race Finish August 25, 2020 12:24:22am UTC
Outcome Win (1 of 5)
Accuracy 93.0%
Points 31.66
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.