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JamesOza
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Homework Statement
A particle of mass [itex]m[/itex] and charge [itex]-q[/itex] moves in a circular orbit of radius [itex]R[/itex] about a fixed charge [itex]Q[/itex]. The angular frequency for the orbit is given by [tex]\omega_0^2 = \frac{qQ}{4 \pi \epsilon_0 m R^3}[/tex] A uniform magnetic field of magnitude [itex]B[/itex] in a direction perpendicular to the plane of the orbit is turned on. As a result, the angular frequency is changed to [itex] \omega_0 + d\omega[/itex]. Assuming that [itex]B[/itex] is sufficiently small so that products of [itex]B[/itex] and [itex]d\omega[/itex] can be neglected, calculate [itex]d\omega[/itex].
The Attempt at a Solution
This problem has frustrated me for days, particularly as I know the answer to be [tex]d\omega = \frac{qB}{2m}[/tex] I have tried using the Lorentz force with motion in a circle to try and obtain the answer, but end up nowhere. There must be some mathematical trickery, possibly with approximations, that I’m missing. Any help and hints with how to start and proceed with this problem will be greatly appreciated.
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