Ben (lampost)

Race #1515

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Official speed 67.39 wpm (50.39 seconds elapsed during race)
Race Start December 19, 2018 4:23:00am UTC
Race Finish December 19, 2018 4:23:51am UTC
Outcome No win (2 of 5)
Accuracy 95.0%
Points 50.54
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.