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Homework Help: Current in Two Parallel Wires

  1. Apr 29, 2012 #1
    1. The problem statement, all variables and given/known data

    So basically there are two parallel wires

    the wire on the left has an increasing current going north.
    What would be the direction of the current in the wire left of it?

    2. Relevant equations

    Right Hand Rules

    3. The attempt at a solution

    So I'm really not sure how an increasing or decreasing current affects wires around it. But I'm guessing that right next to the left wire the magnetic field lines are going in.
  2. jcsd
  3. Apr 29, 2012 #2
    So am I correct to be assuming that both wires are infinite and straight?

    If such is the case, ask yourself if a changing magnetic field (which the time dependent current hints at) would be able to induce a current in a nearby infinite straight wire. Check out Lenz's Law and Faraday's Law for a simple "why does a changing magnetic field induce a current" answer and then apply what you get from those to this problem.
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