Hi guys. I just want to ask about the PF. I am given a problem, a load and a parallel to it capacitor. My questions are:
1. Will the load pf will change, considering that there is parallel capacitor to the load?
2. If the pf will change, upon calculation of the total current, do i need to add the current flowing to capacitor to the current flowing to the load to find the total current flowing before the load? or what?

I would really appreciate any opinion. Thanks

 

The presence of a reactive component(capacitor or inductor) in the load means the votage and current will not be in phase. When current and voltage are not in phase the Power Factor, or pf, is just the cosine of the angle between the voltage and current. You can use Ohms Law in Phasor form to compute the power factor.