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Movement of particles in Magnetic Field

  1. Oct 13, 2009 #1

    Suy

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    Movement of particles in Magnetic Field, Need help!

    1. The problem statement, all variables and given/known data
    http://img132.imageshack.us/img132/9773/81045485.jpg [Broken]

    2. Relevant equations



    3. The attempt at a solution
    i need someone to confirm if this is right...
    1) B
    3)C<B<A
    For the first one, my friend said it's A,because it bends more,
    i think he is wrong...
    If i am wrong, plz explain it
    ty! (just 1 and 3)
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 13, 2009 #2

    rl.bhat

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    Homework Helper

    Path of the charged particle in a uniform magnetic field is given by
    m*v^2/r = qvB
    or
    m*v = q*r*B.
    Now try for the solution.
     
  4. Oct 13, 2009 #3

    Suy

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    r=(mv)/qB, radius is proportional to the velocity,
    B have the largest radius, so the speed will be the fastest

    r=(mv)/qB, radius is proportional to the inverse of charge
    A have the smallest radius, so the charge will the biggest,...
    C<B<A
    am i right?
     
  5. Oct 13, 2009 #4

    Suy

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    anyone... ? I still have 2 more similar question to do, I need some one to confirm if i am right on this one
     
  6. Oct 13, 2009 #5

    rl.bhat

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    Homework Helper

    Your answers are correct.
    For 2, use Flemming's left hand rule to decide the nature of the charges.
     
  7. Oct 13, 2009 #6

    Suy

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    thank you so much!
     
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