Can a Charged Particle Spin Indefinitely in a Magnetic Field?

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Discussion Overview

The discussion centers on the possibility of a charged particle spinning indefinitely in a magnetic field, exploring theoretical and experimental aspects of charged particle dynamics in magnetic environments.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether a charged particle can be introduced into a magnetic field and maintain circular motion indefinitely, regardless of the surrounding environment.
  • Another participant suggests that if the particle moves fast enough, it could potentially spin indefinitely, drawing an analogy to the behavior of a paperclip in a magnetic field.
  • A different viewpoint introduces the idea of using charged plates positioned perpendicular to the magnetic field to potentially increase the particle's kinetic energy while it travels in circles.
  • There is a clarification regarding the orientation of the magnetic field, with a participant noting that a magnetic field typically surrounds an object.
  • One participant references the cyclotron as a relevant example of charged particles in magnetic fields, while also noting that collisions with other particles could occur if the environment is not a vacuum.

Areas of Agreement / Disagreement

Participants express varying opinions on the feasibility of indefinite circular motion for charged particles in magnetic fields, with no consensus reached on the conditions necessary for such motion.

Contextual Notes

Some assumptions about the behavior of charged particles in magnetic fields remain unaddressed, such as the effects of environmental factors and the specifics of particle interactions with charged plates.

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If a charged particle experiences a force in a magnetic field would it be possible to introduce a charged particle into an magnetic field and keep it spinning around in circles indefinately whether its in a vacuum or not.
 
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I should assume so, as long as the particle was moving fast enough. Sometimes when we are bored in physics, the teacher gets his big magnet out and we see how far round a paper clip will go if we throw it through the gap in the magnet. Obviously we have never had an orbiting paperclip but i believe that if the density of the flux was high and the particle moving fast enough, then it could happen.

Well, it works for gravity don't it? :wink:
 
Now all I need is a paperclip :). What if you put two charged plates perpendicular to the direction of the magnetic field. Would the particle gain more kinetic energy if it is traveling round in circles (more time spent between the plates) than if it went in a strait line between the plates?
 
as long as the plates were the opposite charge to the particle. I am not sure what you mean about perpendicular to the field, a magnetic field is usually all around an object.
 

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