Electrons and protons are accelerated by the electric field strength of 3 x 10 ^{4 / m, acting over 10 cm, and then they get in a uniform magnetic field with induction of 1 T acting in a plane perpendicular to the electric field. Determine: a) the ratio of the cyclic frequency of rotation of the particles in a magnetic field; b) the radius of the trajectory of each particle.}

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