---
title: "A rectangular loop of wire carrying a constant clockwise current \\(I\\) lies flat in the plane of the page. A uniform magnetic field \\(\\vec{B}\\) is directed parallel to the plane of the page, pointing toward the top of the page. Which of the following statements correctly describes the net magnetic force and net magnetic torque exerted on the loop, along with the correct justification?"
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url: "https://nerd-notes.com/ubq/118493/"
date_modified: "2026-08-04T08:11:04+00:00"
---

# A rectangular loop of wire carrying a constant clockwise current \(I\) lies flat in the plane of the page. A uniform magnetic field \(\vec{B}\) is directed parallel to the plane of the page, pointing toward the top of the page. Which of the following statements correctly describes the net magnetic force and net magnetic torque exerted on the loop, along with the correct justification?

A rectangular loop of wire carrying a constant clockwise current \(I\) lies flat in the plane of the page. A uniform magnetic field \(\vec{B}\) is directed parallel to the plane of the page, pointing toward the top of the page. Which of the following statements correctly describes the net magnetic force and net magnetic torque exerted on the loop, along with the correct justification?

![A rectangular wire loop lies in the plane of the page. Three parallel vertical arrows point toward the top of the page, labeled B. Inside the loop, clockwise current flow is indicated by arrows along the four straight edges labeled I. No other labels, lines, text, or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785831064-FB9771.jpg)

- **A.** The net magnetic force is non-zero because magnetic forces act in the same direction on all sides of the loop, and the net magnetic torque is zero because these forces cancel out about the center.
- **B.** The net magnetic force is zero because the magnetic dipole moment of the loop is zero, and the net magnetic torque is zero because the magnetic field is parallel to the plane of the loop.
- **C.** The net magnetic force is non-zero because magnetic forces on opposite sides reinforce each other, and the net magnetic torque is non-zero because the forces act along different lines of action.
- **D.** The net magnetic force is zero because opposite sides of the loop experience equal and opposite magnetic forces, and the net magnetic torque is non-zero because these equal and opposite forces act along different lines of action.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/118493/*