RLC homework help!

Discussion in 'Homework Help' started by ali8tor, Aug 27, 2013.

  1. ali8tor

    Thread Starter Member

    May 29, 2012
    43
    0
    hello

    I need help with homework i have been given, i have calculated Ztotal but im stuck on how to calculate Vtotal the answers been given but i cant figure it out.

    help please :(
     
  2. daviddeakin

    Active Member

    Aug 6, 2009
    207
    27
    Use the current you have been given to find the voltage across the 7R+398uF branch.
    Then use that voltage to find the current in the 5R+0.19H branch.
    Combine them to find the total current in the circuit, and hence the total voltage across the circuit.
     
  3. WBahn

    Moderator

    Mar 31, 2012
    17,718
    4,788
    It often helps to sketch the circuit with just resistors instead of the inductors and capactors and then consider how you would approach the problem if it were just a DC resistive circuit problem. Then apply that same approach to the actual problem.
     
  4. Yakima

    Member

    Jan 23, 2012
    35
    2
    Convert all inductances and capacitances to impedences, including their phase angle. Redraw the diagram using resistors only, but including the impedances calculated as resistors. Now solve it the same way you would solve a resistor circuit being sure to include the phase angles in your calculations.
     
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