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Race #5308

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Official speed 111.56 wpm (30.44 seconds elapsed during race)
Race Start June 5, 2019 10:13:19am UTC
Race Finish June 5, 2019 10:13:49am UTC
Outcome Win (1 of 4)
Accuracy 97.0%
Points 83.67
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.