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A particle that has an 6.4-?C charge moves with a velocity of magnitude 4 × 105 m/s along the +x axis. It experiences no magnetic force, although there is a magnetic field present. The maximum possible magnetic force that the charge with the given speed could experience has a magnitude of 0.46 N. Find the magnitude and direction of the magnetic field. Note that there are two possible answers for the direction of the field.

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