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Homework Help: How did they find V[sub]RMS[/sub] value here?

  1. Apr 24, 2014 #1
    1. The problem statement, all variables and given/known data

    OjmUSLY.png

    2. Relevant equations



    3. The attempt at a solution

    How did they get VRMS=120∠0° in part b?
     
  2. jcsd
  3. Apr 24, 2014 #2

    gneill

    User Avatar

    Staff: Mentor

    It is given that the voltage source is 120 V RMS. The voltage source provides the phase reference so it's automatically defined to have a zero phase angle.
     
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