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Motional EMF -- problem 7.7 in Griffith

  1. Jun 6, 2017 #1
    1. The problem statement, all variables and given/known data
    7.7.png
    I need help in solving (c) and (d).
    2. Relevant equations


    3. The attempt at a solution
    Since the force acting on the bar is Magnetic force and magnetic force does no work, the speed of the bar will remain same i.e. v0.
    Question (d) is not making sense to me.
     
  2. jcsd
  3. Jun 6, 2017 #2

    cnh1995

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    Homework Helper

    Energy is being dissipated in the resistor. Where is this energy coming from?
     
  4. Jun 6, 2017 #3

    rude man

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    Gold Member

    Compute the energy dissipated in the resistor as ∫i2R dt.
     
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