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Homework Help: A 1000 Turn Loop Of Wire

  1. Mar 4, 2010 #1
    1. The problem statement, all variables and given/known data
    A 1000-turn loop (radius = 0.037m) of wire is connected to a (20 Ohm) resistor as shown in the figure. A magnetic field is directed perpendicular to the plane of the loop. The field points into the paper and has a magnitude that varies in time as B=gt, where g=0.25 T/s. Neglect the resistance of the wire.
    http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype64/prob03a_cj22.26.gif

    What is the magnitude of the potential difference between points a and b?



    2. Relevant equations

    equation is E = -NA ((dB(t))/dt) but how do u find what t and what is B(t)?

    3. The attempt at a solution
    cant attempt cause i dont know what t and B(t) are

    PLEASE HELP!
     
  2. jcsd
  3. Mar 4, 2010 #2

    rock.freak667

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    You were give B=gt. You have the value of 'g'. I think you can easily find dB/dt.
     
  4. Mar 4, 2010 #3
    ok well i dont remember how to find B with what is given to me. sorry. if you can just give me some equations i can do the work. not asking for u to do the work for me
     
  5. Mar 5, 2010 #4

    rock.freak667

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    B=gt...dB/dt :confused:

    B=0.25t...dB/dt = ?


    B=t2,dB/dt = 2t
     
    Last edited: Mar 5, 2010
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