Path of Electron in Magnetic Fields | 0.1mT & 1.0mT

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The discussion revolves around the behavior of an electron beam entering a magnetic field created by Helmholtz coils, with one field being 0.1 mT (Earth's magnetic field) and the other 1.0 mT (from the coils). The initial assumption that the electron's path would be circular is challenged, indicating a misunderstanding of the forces at play. Participants express confusion about the role of the Helmholtz coils and seek clarification on the problem's specifics. The conversation highlights the need for a better grasp of the physics involved in electron motion within magnetic fields. Understanding the combined effects of both magnetic fields is crucial for determining the electron's trajectory.
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Homework Statement



The original direction of the electron beam as it enters the magnetic field is along the earth’s magnetic field. If the magnitude of the earth’s magnetic field is 0.1 mT and the magnetic field due to the Helmholtz coils is 1.0 mT (perpendicular to the electron beam), the resulting path of the electron can be best described as:

Homework Equations



I have no idea where to begin.

The Attempt at a Solution



I guessed it would be circular but that is wrong.
 
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Uh, where did the Helmholtz coils come into the picture? Is this the question in its entirety?
 

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