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Transformer Question

  1. Dec 14, 2011 #1
    1. The problem statement, all variables and given/known data

    http://i.imgur.com/DBoKH.png
    DBoKH.png


    2. Relevant equations



    3. The attempt at a solution

    V1/V2=N1/N2, that means there shouldn't be a current. Why it is 0?
    Thanks!
     

    Attached Files:

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  2. jcsd
  3. Dec 14, 2011 #2
    Look carefully at what is connected to the primary coil.
     
  4. Dec 14, 2011 #3
    Sorry, but I didn't notice any difference...
     
  5. Dec 14, 2011 #4
    It is a battery !!!!
     
  6. Dec 14, 2011 #5
    Thank you!!
     
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