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Homework Help: Diretion of current

  1. Feb 24, 2008 #1
    A loop of wire is initially held above a short solenoid. A constant counterclockwise (as viewed from above) current passes through the coils of the solenoid. Suppose that the loop of wire is steadily lowered, passing over the solenoid.
    What is the direction of the induced current when the loop is at the midpoint of the solenoid and still moving downward?

    When the loop is at the top, I know the current is clockwise. But how do I do this one? Is it still clockwise?
    Last edited: Feb 24, 2008
  2. jcsd
  3. Feb 24, 2008 #2

    Doc Al

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    Staff: Mentor

    Which way is the field of the solenoid pointing? As the loop is lowered, how is the flux through it changing? The induced current always opposes any change in flux. (Faraday's/Lenz's law.)
  4. Feb 24, 2008 #3
    um, it doesn't change in the middle?
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