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AP Physics 2
12.3 Magnetism and Current-Carrying Wires
IntermediateMCQMathematicalConceptual19.8k
A vertical rectangular wire loop lies in the plane of the page. Exactly four small arrows along the perimeter of the loop indicate a clockwise current \(I\): one arrow pointing to the right on the top horizontal segment, one pointing downward on the right vertical segment, one pointing to the left on the bottom horizontal segment, and one pointing upward on the left vertical segment. A horizontal dashed line crosses the middle of the loop, dividing it into an upper half and a lower half. The region above the dashed line contains a grid of twelve evenly spaced \(\times\) symbols labeled \(\vec{B}\) to represent a uniform magnetic field directed into the page. The region below the dashed line contains no symbols and is labeled \(\vec{B} = 0\). No other labels, lines, text, or axes appear.
A rectangular current loop partially immersed in a uniform magnetic field \(\vec{B}\) directed into the page.
A rigid, rectangular wire loop carries a constant clockwise electric current \(I\). The loop is held fixed in the plane of the page and is positioned such that only its upper half is located within a uniform magnetic field \(\vec{B}\) directed perpendicularly into the page, while its lower half is in a field-free region. Which of the following correctly identifies both the direction of the net magnetic force on the entire loop and the direction of the magnetic force exerted on the right vertical segment of the loop?

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