(a) What is the speed of a beam of electrons when the simultaneous influence of an electric field of 1.56 × 104 V/m and a magnetic field of 4.62 × 10-3 T, with both fields normal to the beam and to each other, produces no deflection of the electrons? (b) In a diagram, show the relative orientation of the vectors (c) When the electric field is removed, what is the radius of the electron orbit? What is the period of the orbit?
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