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TeachMeFinance.com - explain Power factor Power factor The term 'Power factor' as it applies to the area of reclamation can be defined as ' The ratio of real to total power. In alternating-current power transmission and distribution, the cosine of the phase angle between the voltage and current. When the load is inductive such as an induction motor, the current lags the applied voltage, and the power factor is said to be a lagging power factor. When the load is capacitive such as a synchronous motor or a capacitive network, the current leads the applied voltage, and the power factor is said to be a leading power factor. The ratio of the true power passing through an electric circuit to the product of the voltage and amperage in the circuit. This is a measure of the lag or load of the current with respect to the voltage'. The term 'Power factor' as it applies to the area of photovoltaics can be defined as ' The cosine of the phase angle between the voltage and the current waveforms in an ac circuit. Used as a designator for inverter performance. A power factor of 1 indicates current and voltage are in phase and power is equal to the product of volt-amperes. (no reactive power)'. The term 'Power factor' as it applies to the area of energy can be defined as ' The ratio of real power(kilowatt) to apparent power kilovolt-ampere for any given load and time'. Previous 5 Terms: Power demand Power Density Power exchange Power exchange generation Power exchange load Next 5 Terms: Power Factor Power loss Power marketers Power Of Attorney Power pool About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.