Answer / sagar upadhyay

If the load is purely reactive, then there is no need to find
out real power since it will be zero. But if there is some
resistance in the circuit, real power tells us the loss in
the resistor.
Reactive power is used to measure the power factor of the
circuit. since, higher the pf, higher will be the power
quality of the circuit. We always try to reduce the reacive
power keeping apparent power constant & in this way pf is
improved.

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