●Now suppose a weak (in the sense that eB ≪ 2mω) magnetic field = Bẑ is turned on normal to the plane of this orbit. The original angular frequency ω becomes ω' = ω + Δω. 25.Suppose the orbital radius is unchanged. What is Δω? (A) eB/2me (B)(C) evB/(me rB) (D) v/rB (E) none of the above.