A proton with a charge qp = +e = +1.60 × 10–19 C moves with a speed v = U × 105 m/s East through the Earth’s magnetic field, which has a value of B = 55.0 ?T and points northward at a particular location. What is the strength of the magnetic force F when the proton moves eastward?
charge = q = 1.6 x10^-19 c
speed = v = 10^5 m/sec
magnetic field = B = 55 x10^-6 T
magnetic force = F = q v B sin90
F = q v B = 1.6 X 10^-19 * 10^5 * 55 X 10^-6 = 88 X 10^-20 N
= 8.8 X 10^-19 N
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