DWG (lsunixl)

Race #948

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Official speed 97.56 wpm (34.81 seconds elapsed during race)
Race Start July 29, 2020 2:53:58pm UTC
Race Finish July 29, 2020 2:54:33pm UTC
Outcome Win (1 of 5)
Accuracy 97.0%
Points 73.17
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.