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Two protons (charge q= 1.602·10-19 C) move at the same speed v= 1.4 ·106 m/s in opposite directions parallel to the x-axis. At the instant when they are at the same x-position, the proton moving in the negative direction is at distance r= 0.7 mm in the positive y-direction with respect to the one moving in the positive direction.

What is the magnitude of the magnetic field at the point of the proton moving in the negative direction?
B=


What is the magnetic force direction experienced by the proton moving in the negative direction?
FB=