A proton is projected horizontally with speed into the space between two horizontal…

PHYSICS · Single correct · IB Diploma Programme · Physics · Motion in electric and magnetic fields · Motion in electric and magnetic fields

Problem

A proton is projected horizontally with speed 3.0×106 m ⁣/ ⁣s3.0\times10^{6}\,\text{m}\!\bigm/\!\text{s} into the space between two horizontal parallel plates that are 10 cm10\,\text{cm} long and separated by 1.0 cm1.0\,\text{cm}. The top plate is at a potential of +300 V+300\,\text{V} relative to the bottom plate. Neglect gravity. The proton enters midway between the plates at the left edge. How far vertically from its entry point is the proton when it exits the plates? (a) 0.16 mm0.16\,\text{mm} (b) 3.2 mm3.2\,\text{mm} (c) 1.6 mm1.6\,\text{mm} (d) 16 mm16\,\text{mm}

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