Pk 1
Pk 1 :
Peak (pk) is the maximum value, either positive (pk+) or negative (pk-), that a waveform attains. Peak values can be expressed for voltage (the usual case), current, or power. Alternating current (AC) waveforms reach peaks in two directions of polarity or current flow. These peaks are usually of equal amplitude and opposite polarity. However, if a direct current (DC) component exists, pk+ differs from pk-. An example of an AC wave with a DC component, showing the pk+ and pk- values, is shown below. For an AC sine wave without a DC component, the peak amplitude is equal to approximately 1.414 times the root-mean-square amplitude
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