Magnetic lines of force are also referred to as ___.

• A. flux lines
• B. current lines
• C. potential lines
• D. electric field lines

Answer: (A)

Magnetic field lines visualize the magnetic field and are commonly called flux lines. The term flux lines emphasizes that these lines represent magnetic flux—the amount of magnetic field passing through an area—and their density indicates field strength: tighter lines mean a stronger field. This is why magnetic lines of force are referred to as flux lines. Other terms describe electric fields or aren’t standard for magnetism, so they don’t fit as well.