Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Inductance question...

  1. Jan 2, 2018 #1
    1. The problem statement, all variables and given/known data

    (c) See if you can show that L1 and L2 can be replaced by the

    equivalent inductor, Leq, of FIGURE 4(b) where Leq = L1L2-M^2/L1+L2-2M

    2. Relevant equations

    3. The attempt at a solution


    Leq = V(L2-M)/jω(L1*L2-M^2) + V(L1-M)/jω(L1*L2-M^2)

    = V*(L1+L2)-2M/jω(L1*L2-M^2)

    V/jω*Leq = L1*L2-M^2/L1+L2-2M

    Can anybody tell me if I'm close with this one or not? Struggling for days with it!

    Any advice is appreciated!
  2. jcsd
  3. Jan 2, 2018 #2


    User Avatar

    Staff: Mentor

  4. Jan 2, 2018 #3
    Ahh great! So after reading through I presume 'his_tonyness' got part 'C' correct since he wasn't corrected by yourself apart from I=I1+I2?
  5. Jan 2, 2018 #4


    User Avatar

    Staff: Mentor

    I believe that is the case. It's been a while since I took part in that thread (2015).
  6. Jan 3, 2018 #5
    Many thanks gneill!!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted