cf (hcf001)

Race #298

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Official speed 45.39 wpm (74.82 seconds elapsed during race)
Race Start November 6, 2020 11:14:11am UTC
Race Finish November 6, 2020 11:15:26am UTC
Outcome No win (3 of 5)
Accuracy 96.0%
Points 34.04
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.