<P> Power Quality Analyzers, often referred to as Power Analyzers, make a digital recording of the voltage and current waveform (typically either one phase or three phase) and accurately calculate true power (watts), apparent power (VA) power factor, AC voltage, AC current, DC voltage, DC current, frequency, IEC61000 - 3 - 2 / 3 - 12 Harmonic measurement, IEC61000 - 3 - 3 / 3 - 11 flicker measurement, individual phase voltages in delta applications where there is no neutral line, total harmonic distortion, phase and amplitude of individual voltage or current harmonics, etc . </P> <P> English - language power engineering students are advised to remember: "ELI the ICE man" or "ELI on ICE"--the voltage E leads the current I in an inductor L; the current leads the voltage in a capacitor C . </P> <P> Another common mnemonic is CIVIL--in a capacitor (C) the current (I) leads voltage (V), voltage (V) leads current (I) in an inductor (L). </P>

Which of the following is the power factor in an ac circuit