Help Needed: Magnetism and Electron/Alpha Particle Motion

AI Thread Summary
To solve the problem of comparing the frequency of an electron and an alpha particle moving in a magnetic field, one must use the formula for the frequency of a charged particle in a magnetic field, which is dependent on the charge and mass of the particles. The key is to recognize that the frequency is inversely proportional to the mass of the particle and directly proportional to its charge. Since the electron has a much smaller mass compared to the alpha particle, it will have a higher frequency of revolutions per second. Understanding these relationships will allow for the calculation of the frequency ratio between the two particles. The discussion emphasizes the importance of knowing the relevant equations to find the solution.
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Homework Statement



Hi guys. I'm stuck at a question that has to do with magnetism and I would really appreciate some help!

The question is:

"An electron and an alpha particle are in a magnetic field and moves in circles with the same tangential speed. Calculate the ratio between the number of revolutions per second that the electron does compared to the alpha particle."

(sorry if it's not 100% correct, since english is not my first language, translated the question from another language...)

Thanks! :)
 
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number of revolutions per second is essentially the frequency...

so if u do know the equation for the frequency of a particle in a magnetic field... you should be able to determine the ratio of frequencies for the alpha particle and the electron!
 


Mandeep Deka said:
number of revolutions per second is essentially the frequency...

so if u do know the equation for the frequency of a particle in a magnetic field... you should be able to determine the ratio of frequencies for the alpha particle and the electron!

hmm, ok.. how do I find out that equation then?
 
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