pingx (jpairat)

Race #1683

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Official speed 81.26 wpm (41.79 seconds elapsed during race)
Race Start May 31, 2019 9:15:13am UTC
Race Finish May 31, 2019 9:15:55am UTC
Outcome Win (1 of 2)
Accuracy 96.0%
Points 60.94
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.