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Verify that the cyclotron frequency omeg...

Verify that the cyclotron frequency `omega=eB//m` has the correct dimensions of `[T]^-1`.

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If a charged particle is moving perpendicular to the magnetic field, then `qvB=(mv^2)/(r)` or `(qB)/(m)=(v)/(r)=omega`
`:.` Dimensions of `omega=(qB)/(m)=v/r=(LT^-1)/(L)=[T^-1]`
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