---
title: "A cylindrical bar magnet has a north pole at end \\(N\\) and a south pole at end \\(S\\). Which of the following correctly identifies the direction of the magnetic field \\(\\vec{B}\\) inside the bar magnet and the value of the net magnetic flux \\(\\oint \\vec{B} \\cdot d\\vec{A}\\) through a closed surface that completely encloses end \\(N\\)?"
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url: "https://nerd-notes.com/ubq/118481/"
date_modified: "2026-08-04T08:10:58+00:00"
---

# A cylindrical bar magnet has a north pole at end \(N\) and a south pole at end \(S\). Which of the following correctly identifies the direction of the magnetic field \(\vec{B}\) inside the bar magnet and the value of the net magnetic flux \(\oint \vec{B} \cdot d\vec{A}\) through a closed surface that completely encloses end \(N\)?

A cylindrical bar magnet has a north pole at end \(N\) and a south pole at end \(S\). Which of the following correctly identifies the direction of the magnetic field \(\vec{B}\) inside the bar magnet and the value of the net magnetic flux \(\oint \vec{B} \cdot d\vec{A}\) through a closed surface that completely encloses end \(N\)?

![A horizontal rectangular bar magnet with its left pole labeled N and its right pole labeled S. A dashed oval represents a closed Gaussian surface enclosing only the left end containing pole N. Outside the magnet, curved magnetic field lines with arrows extend from pole N around to pole S. No field lines or arrows are shown inside the magnet. No other labels or text appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785831058-RQ4HaX.jpg)

- **A.** Direction inside magnet: From \(N\) to \(S\) ; Net magnetic flux: Greater than zero
- **B.** Direction inside magnet: From \(N\) to \(S\) ; Net magnetic flux: Zero
- **C.** Direction inside magnet: From \(S\) to \(N\) ; Net magnetic flux: Zero
- **D.** Direction inside magnet: From \(S\) to \(N\) ; Net magnetic flux: Greater than zero

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/118481/*