Circuit Analysis

Discussion in 'Homework Help' started by johndoe45, Oct 4, 2010.

  1. johndoe45

    Thread Starter Member

    Jan 30, 2010
    364
    1
    i seriously can't figure this problem out :(

    Due tomorrow

    i just want to create an excel program to calculate the voltages and currents at every resistor.

    can you at least tell me what is in parallel or in series or how to at least start it?

    I haven't even finished one circuits class and am a mechanical engineer. Circuits class was prerequisite for this course, but i waivered it. So i have no idea where to start.
    Our Teacher's Assistant drew the second diagram and said those circles were potentiometers. He said to look at the circuit in that way to make it easier.
     
  2. johndoe45

    Thread Starter Member

    Jan 30, 2010
    364
    1
    my approach was to find R_equivalent for whole circuit.

    from what i get r2 and r3 are in series.
    and the equivalent for that is in parallel with the middle potentiometer. after that i'm lost. or is there an easier way to analyze this?
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    I am a bit rusty now when it comes to complicated calculations but I can tell that a parallel circuit has two common points. A series one has only one
     
  4. johndoe45

    Thread Starter Member

    Jan 30, 2010
    364
    1
    i got it. used mesh analysis using KVL and ohm's law. then put into a matrix and solved with excel for currents. then found voltages with relations from mesh analysis,

    Used Multisim to double check.
     
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