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AP Physics 2
12.2 Magnetism and Moving Charges
IntermediateMCQMathematicalConceptual18.4k
A rectangular region of magnetic field is represented by a uniform grid of sixteen small cross symbols arranged in four rows and four columns, labeled with the variable B to indicate a magnetic field directed perpendicularly into the page. A small circle containing a positive plus sign represents a proton entering the left side of the region. A horizontal vector arrow labeled with the variable v extends from the center of the proton circle straight toward the right, perpendicular to the magnetic field vectors. No other labels, lines, text, or axes appear.
A proton entering a uniform magnetic field directed into the page.
A proton with a charge of magnitude \(1.6 \times 10^{-19} \text{ C}\) enters a uniform magnetic field of magnitude \(B = 0.20 \text{ T}\) directed perpendicularly into the page, as shown in the diagram. The proton travels horizontally to the right with a speed of \(v = 5.0 \times 10^5 \text{ m/s}\). Which of the following correctly pairs the magnitude of the initial magnetic force acting on the proton with the initial direction in which its path curves?

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