1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Mutual Inductance (ouch, my brain)

  1. Feb 27, 2007 #1
    1. The problem statement, all variables and given/known dataDuring a 65 ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 6.0 mA current in a nearby secondary coil. The secondary coil is part of a circuit in which the resistance is 12 . The mutual inductance between the two coils is 3.1 mH. What is the magnitude of the change in the primary current?



    2. Relevant equations
    mutual inductance: M = (number of loops in coil 2 * flux through coil 2)/ current of coil 1

    Faradays law
    emf = -M x (change in voltage of coil 1/change in time)


    3. The attempt at a solution
    i could use faraday's law to solve for change in current of coil 1, but i dont know what the emf is.
    i know the formula for emf is vBL, but i dont know v, B, or L!!!
    i cant use the mutual inductance formula because i dont know the # of loops in coil 2.
    If someone could please point me in the right direction here i would greatly appreciate it.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Mutual Inductance (ouch, my brain)
Loading...