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Homework Help: Proton in magnetic field

  1. Jan 28, 2013 #1
    1. The problem statement, all variables and given/known data
    Proton is moving in the homogen magentic field with B=0,1T. Mass of proton is 938MeV/c02.

    How much is the radius of helix at which proton is moving, if his speed is 0,99*c0, and the angle between helix and magnetic field is 60°.

    2. Relevant equations
    y=[itex]\frac{1}{\sqrt{1-\frac{v^2}{c0^2}}}[/itex]

    r=[itex]\frac{m*v*y*sin(α)}{c0^2*B}[/itex]

    3. The attempt at a solution
    I have tried to solve it in relativistic way whith equations that I wrote, but the result is wrong. What I am doing wrong?

    I hope the post is ok and sory for potential mistakes in spelling and greetings from Slovenia.
     
  2. jcsd
  3. Jan 29, 2013 #2
    I don't understand where you got your equations.

    Also, what do you mean "relativistic"? I don't think there should be any gammas anywhere in this calculation: all you use is the Lorentz force [itex]\vec{F}= q \vec{v} \times \vec{B} [/itex].
     
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