Question: ( 2 0 - 1 4 ) What is the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric

(20-14) What is the velocity of a beam of electrons that goes undeflected when moving perpendicular to an electric and to a magnetic field. E and B are also perpendicular to each other and have magnitudes 7.7103 V/m and 7.5103 T, respectively. What is the radius of the electron orbit if the electric field is turned off?

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