sam (guest99898)

Race #1235

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Official speed 36.05 wpm (94.20 seconds elapsed during race)
Race Start September 21, 2020 11:19:54pm UTC
Race Finish September 21, 2020 11:21:29pm UTC
Outcome No win (2 of 5)
Accuracy 94.0%
Points 27.04
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.