So you have chosen DEATH (mathandphysicsftw)

Race #23412

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Official speed 137.43 wpm (24.71 seconds elapsed during race)
Race Start August 7, 2019 12:18:13am UTC
Race Finish August 7, 2019 12:18:38am UTC
Outcome No win (2 of 2)
Accuracy 99.0%
Points 103.07
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.