Magnetic Field Lines Diagram - Visual Explanation of Magnetism #3833821 (License: Personal Use)

This black-and-white line diagram depicts the invisible magnetic field surrounding a rectangular bar magnet, with labeled North (N) and South (S) poles. Curved field lines emerge from the North pole, loop externally, and re-enter at the South pole, illustrating field direction and relative strength (denser lines near poles). The symmetry and spacing reflect standard conventions used in introductory physics education.

Commonly used in educational websites, textbooks, and classroom slides to teach magnetism, electromagnetic theory, and field concepts; matches user intent for visual learning, homework help, or curriculum development.