when current lags behind voltage how does it affect the
circuit.In other words what is the significance of lagging
current?
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Answer Posted / karl
I dont think the significance is that you will lose energy.
For example if I was to connect a capacitor in a AC
circuit, it would charge and then discharge back into the
supply. Therefore not using any real power. This would be
the same for a pure coil with its reactive energy. I think
the problem with a poor PF is that for a certain load you
may need to have a bigger transformer or generator. For
example a 1kW load with PF if 0.5 would need a xformer size
of 2kVA. If the PF was 1 you would need only a 1kVA
xtransofrmer even though you are still using the same power
and therefore energy.
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