Phase quadrature: When the phase difference between two waves is 90 0 (it may be = + 90 0 or – 90 0), then the waves are said to be in ‘Phase quadrature’. Leading phase means, a waveform is ahead of another wave with the same frequency and Lagging phase means, a waveform is behind another wave with the same frequency. The complete phase of a waveform can be defined as 2π radians or 360 degrees. The phase difference represented by the Greek letter Phi (Φ). This is also called as “Phase angle” or “Phase offset”. The phase difference of a sine wave can be defined as “The time interval by which a wave leads by or lags by another wave” and the phase difference is not a property of only one wave, it’s the relative property to two or more waves. Voltage and Current Phase Relationships to R,L,C.Phase Relationship of a Sinusoidal Waveform.
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