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Homework Help: Determine the magnitude of the current in the circuit

  1. Apr 14, 2008 #1
    This is a problem I had for homework. I want to make sure I did it correctly.

    http://i90.photobucket.com/albums/k256/dedra73/circuit-2.jpg

    circuit-2.jpg


    (a) Determine the magnitude of the current in the circuit and
    I = (30-10)V / (27+5+8+12)Ω
    =20V/52Ω
    =.3846A

    (b) The magnitude of the voltage between the points labeled A and B.
    Vab = 30V - .3846A * 27Ω
    = 30V- 10.3842V
    = +19.6158V

    (c) State which point, A or B, is at the higher potential.
    Point B is 19.6158V higher than A
     
    Last edited by a moderator: Apr 14, 2008
  2. jcsd
  3. Apr 14, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Looks good to me!
     
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