AP Physics C Electricity and Magnetism Quiz
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MAGNETIC FIELDS AND ELECTROMAGNETISM
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A charged particle in a uniform magnetic field illustrates how moving charges and magnetic fields interact. An electron (∣q∣=1.60×10−19 C|q|=1.60\times10^{-19}\,\text{C}, m=9.11×10−31 kgm=9.11\times10^{-31}\,\text{kg}) enters a region with B⃗=2.0×10−3 T\vec B=2.0\times10^{-3}\,\text{T} directed upward. Its velocity is v=4.0×106 m/sv=4.0\times10^6\,\text{m/s} to the east, so θ=90∘\theta=90^\circ and the Lorentz force magnitude is F=∣q∣vBF=|q|vB. The force is perpendicular to v⃗\vec v, so the electron moves in a circle at constant speed with radius r=mv/(∣q∣B)r=mv/(|q|B). Refer to the scenario above. Calculate the radius of curvature of the electron's path.
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