pf
/F/noun
- 1
Pff
noun
- 1
The ratio of the actual power to the apparent power in an alternating current power system; specifically, the cosine of the phase angle between the voltage and the current.
“The power factor is of interest because it is a measure of the power which does useful work.”
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Source: https://en.wiktionary.org/wiki/pf, https://en.wiktionary.org/wiki/power%20factor