wouldn't
m v^r/r=Bqv
where r= .23/2 ?
A proton with a speed of 3.5 × 10
6
m/s is shot into a region between two plates that are
separated by a distance of 0.23 m. As indicated in the figure, a magnetic field exists between the
plates, and it is perpendicular to the velocity of the proton. What must be the magnitude of the
magnetic field so that the proton just misses colliding with the opposite plat
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