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an electron beam passes through a magnetic field of magnetic induction `2 xx 10^(-3)T` and an electric field of strength `3.4 xx 10^(4) V//m` both acting simultaneously in mutually perpendicular directions. If the path of electrons remains undeviated, calculate the speed of the electrons. If the electric field is removed, what will be the radius of curvature of the trajectory of the electron path after 2s?

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