---
title: "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).  | Row | Force on Segment 1 | Force on Segment 2 | Force 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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url: "https://nerd-notes.com/ubq/123272/"
date_modified: "2026-09-28T11:58:03+00:00"
---

# 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).

| Row | Force on Segment 1 | Force on Segment 2 | Force 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?

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).

| Row | Force on Segment 1 | Force on Segment 2 | Force 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?

![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.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1790596683-ZgJWYl.jpg)

- **A.** Row A
- **B.** Row B
- **C.** Row C
- **D.** Row D

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/123272/*