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Homework Help: Lenz's Law for a Rotating Loop

  1. Apr 6, 2014 #1
    1. The problem statement, all variables and given/known data
    A copper wire loop is initially at rest in a uniform magnetic field (full flux going through it). Between times t=t1 and t=t1+(delta)t the loop is rotated about a vertical axis as shown (no flux going through it). Will current flow through the wire of the loop during this time interval? If so, indicate the direction of the induced current and explain your reasoning.

    2. Relevant equations
    Lenz's Law

    3. The attempt at a solution
    Well, since the loop goes from having flux to having no flux at all I would have assumed there'd be an induced current. However, I can't seem to find a direction of current that would counteract this change in flux. So in that sense would there be no current induced at all?
  2. jcsd
  3. Apr 7, 2014 #2


    User Avatar
    Gold Member

    Where? It seems you forgot to include the diagram.
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