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Need Help with Mid-Term Study Guide Question

  1. Oct 8, 2009 #1
    Question Details:

    A circuit is pulled with a 16-N force toward the right to maintain a constant speed v. At the instant shown, the loop is partially in and partially out of a uniform magnetic field that is directed into the paper. As the circuit moves, a 6.0-A current flows through a 4.0- ohm resistor. What is the direction of the current flow? What is the magnitude of v? Diagram attached.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Oct 8, 2009 #2
    Here's what i have so far, please help?

    F = 16 N, I = 6.0 A, R = 4.0 Ω, find v
    F = IBL, so BL = F/I
    BLv = IR
    Fv/I = IR
    ∴v = I2R/F = 9.0 m/s
     
  4. Oct 8, 2009 #3
    use the right hand rule to determine current flow direction. Which way is the induced force going to be pointing, and in which direction does the current flow for this to be true?
     
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