1 As a proton passes the origin, its velocity is 3.0 x 105 m/sin the positive x direction. What is the magnitude of the magnetic field at the point (12.0 cm, 5.0 cm, 0.0 cm)? 1.2 × 10-20 T 5.2 × 10-20 T 9.2 × 10-20 T 1.1 x 10-19 т 1.8 x 10-19 T 2.4 x 10-19 T Correct.