A proton is projected through a perpendicular uniform electric field as shown. The region of the electric field is 12cm long as shown. The distance between the upper and lower plates is 11.76mm. The proton starts at the vertical midpoint with an initial horizontal speed of 4.63×10¹ m/s. Determine the magnitude of the maximum electric field for which the proton can make it through without hitting the lower plate (in N/C). CE -12.0 cm- Id

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