Power in a Series Circuit

Discussion in 'Homework Help' started by vh1n, May 16, 2010.

  1. vh1n

    Thread Starter New Member

    May 16, 2010
    1
    0
    A load of 20 + j35 ohms is connected across a 220 volt source. Determine the power factor and the reactive power?

    It happens that I'm absent that day when they discussed about power in series circuit.. Can anyone help me.. I have seen a formula on the internet that Reactive power = I^{2} X or Q=E^{2}/X.. But i don't know how to use that formula.. TIA..
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Find the total power in the load (P) and then:

    Preal=P*cos(a)

    Preactive=P*sin(a)

    where a is the angle of the load
     
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