Figures 5, 6 and 7 show the instantaneous
voltage, current and power (V times I) for unity,
leading and lagging power factors. The magnitude
of the current and voltages are held constant for all
cases. Also shown is the corresponding phasor
diagram for each in Figure 5a, 6a and 7a. Note that
for lagging power factor, the current phasor lags
the voltage phasor and the instantaneous current
passes through zero after the voltage. The power
for unity power factor is always positive while
both leading and lagging power factors have some
negative power values, and the peak is less than
for unity. Thus, the average value of power is less
for either leading or lagging power factor for the
same current and voltage
Figures 5, 6 and 7 show the instantaneous
voltage, current and power (V times I) for unity,
leading and lagging power factors. The magnitude
of the current and voltages are held constant for all
cases. Also shown is the corresponding phasor
diagram for each in Figure 5a, 6a and 7a. Note that
for lagging power factor, the current phasor lags
the voltage phasor and the instantaneous current
passes through zero after the voltage. The power
for unity power factor is always positive while
both leading and lagging power factors have some
negative power values, and the peak is less than
for unity. Thus, the average value of power is less
for either leading or lagging power factor for the
same current and voltage
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