j (j3yl)

Race #9

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Official speed 45.58 wpm (74.51 seconds elapsed during race)
Race Start December 8, 2019 8:12:48am UTC
Race Finish December 8, 2019 8:14:02am UTC
Outcome No win (5 of 5)
Accuracy 92.0%
Points 34.18
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.