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Homework Help: Energy loss in the cables

  1. Mar 3, 2013 #1

    I am studying transformers now for the exam and I came across this question. It made a confusion in my mind. I took the photo of the question and put it into attachment.

    The answers B and C looks very similar to eachother and in my humble opinion both of them are true. I would be very happy if somebody explains which is true and why.

    Thank you very much.


    Attached Files:

  2. jcsd
  3. Mar 3, 2013 #2
    Analyze C using Kirchhoff's circuit laws.
  4. Mar 3, 2013 #3
    B is true. And the longer the wire is the bigger the resistance will be.
  5. Mar 3, 2013 #4
    Thank you, I understand now, the current must be the same everywhere. I thought in the first that because the current is being used in the long leeds, it is decreasing. But I understand that this is a misconception.
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