Answer / ramky

cosine of the angle b/w voltage and current is nothing but
the power factor. it is very use full in a.c systems , by
using this we can measure active power

Answer / masoom raza

its cosine of angle between voltage and current of the given system.
its present in both ac and dc circuit but in case of dc its always 1 as angle between voltage and current in this case is always 0 degree.so generally we don't talk about pf in dc.
but in case of ac it varies from 0 to 1.

Answer / jai ganesh

Mr.Pillay
In capacitive load the power factor is leading.
In inductive load the power factor is lagging.

Answer / monika hassan.

Power factor is the ratio of true power or watts to
apparent power or volt amps

Answer / pillay

to make a long storey short Ramky & monika have answered.It is present only in AC circuits.
it is used for the calculation of real power from apparent power.Gives you an idea how capacitive or inductive is a load.

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