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A proton enters the region between the two plates shown in the figure moving in the x-direction with a speed v = 1.61 106 m/s. The potential of the top plate is Vt = 245 V, and the potential of the bottom plate is Vb = 0 V. What is the direction and the magnitude of the magnetic field, B,that is required between the plates for the proton to continue traveling in a straight line along the x-direction? (Let d = 35.0 mm.) B= 1 T

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