At one instant an electron (charge = −1.6×10−19 C) is moving in the xy plane, the components of its velocity being vx = 5.0×105 m/s and vy = 3.0×105 m/s. A magnetic field of 0.80 T is in the positive x direction. At that instant the magnitude of the magnetic force on the electron is: ON 3.8×10−14 N 6.0×10−14 N 6.4×10−14 N 1.0×10−13 N
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