Force on a Moving Charge: A proton moving with a velocity of 4.0 × 104 m/s along the +y-axis enters a magnetic field of 0.20 T directed towards the -x-axis. What is the magnitude of the magnetic force acting on the proton? (e = 1.60 × 10-19 C)
A. 8.0 × 10-15 N
B. 3.9 × 10-15 N
C. 2.6 × 10-15 N
D. 0 N
E. 1.3 × 10-15 N
Answer: E
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