Uniform magnetic field and electric field

  • Thread starter Sixty3
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  • #1
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Homework Statement


How would you find the period of a charged particle in an uniform electric and magnetic field?
The charged particle has velocity that is perpendicular to the magnetic and electric field (which are directed in the x-axis).

Homework Equations


F=q(E+vxB)


The Attempt at a Solution


In the absence of an electric field, I see that the period is given by T=2pi(m/qB). Not sure how I can find it when an electric field is present.
 

Answers and Replies

  • #2
107
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Hey, when you say period, do you mean that the particle is orbiting something?
 
  • #3
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I misunderstood the question, but I need to find the magnitude of the velocity after 'c' revolutions.
 
  • #4
gneill
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What does "directed in the x-axis" mean? If you were to write the three Cartesian components of, say, the electric field vector, what might it look like?
 
  • #5
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I am lost with this question, but to go about finding the velocity at time t I think it's v=q/m (integral)[E+vxB]dt, it's just the limits of integration I'm not able to find.

Thanks for replying.
 

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