A beam of electrons is moving through a region of space in, Ask an Expert

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A beam of electrons is moving through a region of space in which there is an electric field of intensity 3.4 x 10⁴ V/m and a magnetic field of 2.0 x 10^-3 T. The electric and magnetic fields are so oriented that the beam of electrons is not deflected. The velocity of the electrons is approximately:

a) 1.7 x 10⁷ m/s

b) 6.8 x 10⁶ m/s

c) 3.0 x 10⁸ m/s

d) 6.0 x 10^-9 m/s

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