What is the magnetic force on a proton that is moving at 3.8 answer test box choice a 2.0 107 m/s up through a magnetic field that is 0.72 T and pointing toward you? The charge on a proton is 1.6 answer test box choice a 2.0 10-19 C. Use F = qv answer test box choice a 2.0 B sintheta. A. 4.4 answer test box choice a 2.0 10-12 N left B. 6.1 answer test box choice a 2.0 10-12 N left C. 4.4 answer test box choice a 2.0 10-12 N right D. 6.1 answer test box choice a 2.0 10-12 N right