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Homework Help: Magnetron Electron Field Strength

  1. Oct 19, 2008 #1
    1. The problem statement, all variables and given/known data
    Suppose the resonant frequency is f = 1.47×1010 s−1; that is, the electron period of revolution is T = 6.80×10-11 s. What is the corresponding strength of the magnetic field?

    2. Relevant equations

    3. The attempt at a solution

    I understand the general idea, to figure out b, but I don't understand how to figure out Velocity or Radius from the frequency/period.

    Can someone give me a point in the right direction?
  2. jcsd
  3. Oct 20, 2008 #2


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    Homework Helper

    Hi haxxorboi,

    When they give the period, that is the period of what? In other words, if the period is 6.80×10-11 s, what happens every 6.80×10-11 seconds? Once you answer that, you should be able to write down an equation relating T, r, and v. What do you get?
  4. Oct 20, 2008 #3
    Velocity=2*Pi*R/6.8E-11 sec


    B=.5253 T

    Thank you very much, that was killing me!
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