What is it called when a closed loop of magnetic lines from the north pole to the south pole outside of a magnet and from the south pole to the north pole inside of a magnet?

What is it called when a closed loop of magnetic lines from the north pole to the south pole outside of a magnet and from the south pole to the north pole inside of a magnet?

• A. Magnetic loop
• B. Magnetic circuit
• C. Flux path
• D. Flux loop

Answer: (B)

In magnetism, a closed loop of magnetic field lines that goes from the magnet’s north pole to its south pole outside the magnet and then returns from the south pole to the north pole inside the magnet is called a magnetic circuit. This view treats the flux as traveling around a loop much like current in an electrical circuit, with the outside path through air or core and the inside path through the magnet material forming a complete circuit. Thinking this way helps you apply circuit-like ideas: the magnetomotive force drives the flux around the loop, and the reluctance of the path (air gaps, material) governs how much flux flows. Terms like flux path or flux loop describe the path the flux takes, but the standard name for the full closed loop is magnetic circuit.

In magnetism, a closed loop of magnetic field lines that goes from the magnet’s north pole to its south pole outside the magnet and then returns from the south pole to the north pole inside the magnet is called a magnetic circuit. This view treats the flux as traveling around a loop much like current in an electrical circuit, with the outside path through air or core and the inside path through the magnet material forming a complete circuit. Thinking this way helps you apply circuit-like ideas: the magnetomotive force drives the flux around the loop, and the reluctance of the path (air gaps, material) governs how much flux flows. Terms like flux path or flux loop describe the path the flux takes, but the standard name for the full closed loop is magnetic circuit.