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A proton moves at a v = (2 i - 4 j + k ) m/s speed, in the magnetic field given as T, B = (i + 2j - k ). How big is the magnetic force that affects the particle? (proton's charge, q = 1,6 x 10-19 C)
A. 1.32 x 10-19 N
B. 8.25 x 10-19 N
C. 14.04 x 10-19 N
D. 3.20 x 10-19 N

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