¯\_(ツ)_/¯ (plsr)

Race #994

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Official speed 55.78 wpm (60.88 seconds elapsed during race)
Race Start January 2, 2019 9:35:49am UTC
Race Finish January 2, 2019 9:36:50am UTC
Outcome Win (1 of 3)
Accuracy 94.0%
Points 41.83
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.