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In order to go through a velocity selector undisturbed, the magnetic and electric force on charge q=7.1 mC need to cancel out (as
in, they have to point in opposite directions and their magnitudes have to be the same).
Determine the velocity of the charge that can travel through a velocity selector that provides electric field of magnitude
E=2.99×10³ V/m and magnetic field B=7.71 mT.
Provide your answer in km/s.

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