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AP Physics 2
12.3 Magnetism and Current-Carrying Wires
12.1 Magnetic Fields
IntermediateMCQMathematicalConceptual22.1k
A three-dimensional Cartesian coordinate system with three axes meeting at an origin. A horizontal solid axis extending to the right is labeled +x. A vertical solid axis extending toward the top is labeled +y. A solid axis extending diagonally downward and to the left is labeled +z. Three thick solid line segments representing wires start near the origin: Segment 1 lies along the +x-axis with an arrowhead pointing in the +x-direction labeled I; Segment 2 lies along the +y-axis with an arrowhead pointing in the +y-direction labeled I; Segment 3 lies along the +z-axis with an arrowhead pointing in the +z-direction labeled I. Four parallel upward-pointing dashed arrows distributed across the background are labeled B. No other labels, lines, text, or axes appear.
Three orthogonal wire segments carrying current in a uniform magnetic field.
A region of space contains a uniform magnetic field of magnitude \(B\) directed in the \(+y\)-direction (toward the top of the page). Three identical, rigid straight wire segments—Segment 1, Segment 2, and Segment 3—each have length \(L\) and carry a steady current \(I\). Segment 1 carries current in the \(+x\)-direction (to the right), Segment 2 carries current in the \(+y\)-direction (toward the top of the page), and Segment 3 carries current in the \(+z\)-direction (out of the page).

RowForce on Segment 1Force on Segment 2Force on Segment 3
(A)\(ILB\), into the page\(ILB\), toward the top of the page\(0\)
(B)\(0\)\(ILB\), out of the page\(ILB\), to the right
(C)\(ILB\), out of the page\(0\)\(ILB\), to the right
(D)\(ILB\), out of the page\(0\)\(ILB\), to the left

Which row in the table correctly indicates the magnitude and direction of the magnetic force exerted on each wire segment?

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