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Wheatstone bridge with inductances

  1. Dec 9, 2011 #1
    1. The problem statement, all variables and given/known data

    PS2-1.jpg

    2. Relevant equations
    Assume we have Vab.
    Junction Rule:
    I1 = I3 + I4 => I'1 = I'3 + I'4
    I5 = I2 + I3 => I'5 = I'2 + I'3
    Loop Rule:
    V - L1I'1 - L4I'4 = 0
    -L1I'1 - L3I'3 + L2I'2 = 0
    V - L1I'1 - L3I'3 - L5I'5 = 0
    V - L2I'2 - L5I'5 = 0

    3. The attempt at a solution
    First I tried 2 junction equations and 3 loops without V. Then I eliminated to the last 2 equations with 2 unknown, but I got 2 same equations.
    Now I try with the equations above and still got 2 same equations.
    I'm thinking maybe it's not write to say that I1 = I3 + I4 => I'1 = I'3 + I'4.
    I need some suggestions about what loop should I use.
     
    Last edited: Dec 9, 2011
  2. jcsd
  3. Dec 9, 2011 #2
    I have that problem too! we had a group of hella people from 2 physics 421 classes working on that! we didn't get an answer, any new luck?
     
  4. Dec 9, 2011 #3
    Come Back Online! Im with a study partner trying to figure this out! we can ConVerSate! Share Ideas!!!! ! !!! !!!
     
  5. Dec 9, 2011 #4
    ε=Leq[1/[(1/di1)+(1/di2)]]
     
  6. Dec 9, 2011 #5
    Sorry I dont have any idea yet. Are u from Shiwen class also?
     
    Last edited: Dec 9, 2011
  7. Dec 9, 2011 #6
    Yeah, this question blows! we've worked it more than a dozen ways with more than a dozen other people! but the rest of the problems were easy
     
  8. Dec 9, 2011 #7
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