Confusing with this text... Pls help

Russlk said:

You need to find a better text book. This one is very confusing and the author's invention of VAr is ********, in my opinion. What you need to know is that the current in an inductive circuit lags because the magnetic field of the inductor produces a back emf which reduces the effective applied voltage as the voltage increases. When the voltage decreases, the magnetic field collapses which induces an emf that keeps the current flowing.

With capacitive load, the current flow into or out of the capacitor is proportional to the rate of change of voltage. Since the rate of change (for a sinewave) is maximum at zero volts, the current is maximum and 90 degrees leading.

Power factor is just another way of stating the phase angle.

I hope this helps your understanding.

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