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Thread: question about magnetic force

  1. #1 question about magnetic force 
    Forum Freshman
    Join Date
    Apr 2007
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    12
    the formula for magnetic force is F = q(charge) x v(velocity) x B(magnetic field). the magnetic field only affects the perpendicular vector of the velocity, and exerts a centripetal force (inwards circular) on the charge. if this is true, then how does the hall's effect and velocity selectors work? (these imply that magnetic field exerts a non centripetal force with a direction on the charge)

    also, could someone explain helical motion to me? im not sure which way the charge would spin, i know it occurs when the charge is traveling at a velocity neither parallel nor perpendicular with the magnetic field vector


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