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AP Physics 2
12.2 Magnetism and Moving Charges
AdvancedMCQConceptual21.8k
A three-dimensional Cartesian coordinate system showing x, y, and z axes with origin labeled O. The x-axis extends horizontally to the right, the y-axis extends vertically upward, and the z-axis extends diagonally forward and to the left. Exactly four parallel horizontal arrows pointing to the right represent a uniform magnetic field labeled \vec{B}. At the origin, a single small circular dot labeled +q represents a positively charged particle. An arrow labeled \vec{v}_0 starts at the origin and points into the first quadrant of the xy-plane at an acute angle to the x-axis, with dashed component segments along the x-axis labeled v_x and along the y-axis labeled v_y. No other labels, lines, text, or axes appear.
A charged particle entering a uniform magnetic field with initial velocity \(\vec{v}_0\).
A particle with mass \(m\) and positive charge \(q\) is launched into a region of uniform magnetic field \(\vec{B} = B_0 \hat{i}\) with an initial velocity \(\vec{v}_0 = v_x \hat{i} + v_y \hat{j}\), where \(v_x > 0\) and \(v_y > 0\). Which of the following statements correctly describes the resulting trajectory and the kinetic energy of the particle?

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