# Encyclopedia Magnetica

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magnetic_path_length

# Magnetic path length

 Stan Zurek, Magnetic path length, Encyclopedia Magnetica https://E-Magnetica.pl/magnetic_path_length

Magnetic path length, path length or magnetic path, typically represented by the symbol $l$ for “length” 1)2)3) or MPL4) - is the effective path taken by the magnetic flux in a magnetic core or magnetic circuit. The path is measured in the units of length (e.g. metres).

The concept of path length is used in calculations such as: deriving the value of magnetic field strength H from the magnetising current5) in a closed magnetic circuit6), magnetic reluctance7), effective permeability8), and many more.

 * Helpful page? Support us! → All we need is just $0.25 per month. Come on… Fig. 1. Magnetic path in a magnetic core Fig. 2. Gapped core with: total magnetic path length$l$(orange), length of core$l_{core}$(blue) and length of air gap$l_g$(red) Fig. 3. Gapped core with: magnetic path length in the core$l_{core}$(blue) and length of air gap$l_{gap}\$ (red)