The magnetic force on a positive elementary charge traveling at 10.67 percent of speed of light is 6.1 femto-Newton. If the magnetic field is perpendicular to the charge motion, what must be the magnitude of this field? a. 1.2 vT O b. 1.2 µ T c. 1.2 T O d. 1.2 MT e. 1.2 mT
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