Sheldon (rooksword3393)

Race #400

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Official speed 89.62 wpm (37.89 seconds elapsed during race)
Race Start September 30, 2020 5:09:53am UTC
Race Finish September 30, 2020 5:10:31am UTC
Outcome Win (1 of 4)
Accuracy 97.0%
Points 67.22
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.