please help

Discussion in 'Homework Help' started by the teacher, Mar 25, 2008.

  1. the teacher

    Thread Starter New Member

    Mar 25, 2008
    5
    0
    a 120v circuit delivers 5 A to a load that consumes 540 w of power
    what is the power factor of the circuit

    A. 0.20
    B. 0.58
    C. 0.90
    D. 0.97
     
  2. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,373
    1,159
  3. Dave

    Retired Moderator

    Nov 17, 2003
    6,960
    145
    Rearrange:

    P = VI.Cos(\theta)

    Where the power factor is:

    Cos(\theta)

    Dave
     
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