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AP Physics 2
12.3 Magnetism and Current-Carrying Wires
IntermediateMCQMathematicalConceptual24.2k
Cross section of two parallel wires carrying equal currents in opposite directions.
Cross section of two parallel wires carrying equal currents in opposite directions.
Two long, straight, parallel wires are separated by a distance \(2d\). Wire 1 carries a current \(I\) out of the page, and Wire 2 carries an equal current \(I\) into the page. Three points, \(X\), \(Y\), and \(Z\), lie along a horizontal line perpendicular to both wires: point \(X\) is located at the midpoint between the wires, point \(Y\) is located a distance \(0.5d\) to the right of Wire 1 (between the wires), and point \(Z\) is located a distance \(d\) to the right of Wire 2. Which of the following correctly ranks the magnitudes \(B_X\), \(B_Y\), and \(B_Z\) of the net magnetic field at points \(X\), \(Y\), and \(Z\)?

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