wat is the difference between real power and reactive
power..which is useful..?and how it s useful..wat is the
effect of these on a power system...

Answer Posted / shvetang dave

Real power is active powe whichis used to do work or to
produce energy & it is V*A*Cos phi whreas reactive power is
the power which is used to magnetise the magnetic field in
electrical motors,transformers,electrical ballasts etc..and
it is V*A*sin phi

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