e (officialinsert)

Race #618

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Official speed 76.00 wpm (44.68 seconds elapsed during race)
Race Start December 13, 2019 1:14:01pm UTC
Race Finish December 13, 2019 1:14:45pm UTC
Outcome No win (3 of 4)
Opponents 1. xpirep (81.64 wpm)
Accuracy 96.0%
Points 57.00
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.