Force on a Moving Charge: A proton travels at a speed of 5.0 × 107 m/s through a 1.0-T magnetic field. What is the magnitude of the magnetic force on the proton if the angle between the proton's velocity and the magnetic field vector is 30°? (e = 1.60 × 10-19 C)
A. 2.0 × 10-14 N
B. 4.0 × 10-14 N
C. 2.0 × 10-12 N
D. 4.0 × 10-12 N
Answer: D
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