Magnetic Permeability: Definition & Meaning

[omri3012]

What is permeability? I know that it's the ratio between B and H but didn't understand exactly the physical meaning of this concept

 

[tiny-tim]

Hi omri3012!

permeability is the degree of magnetization of a material that responds linearly to an applied magnetic field.

See http://en.wikipedia.org/wiki/Permeability_(electromagnetism) for details.

 

[astrokreng]

Magnetic permeability is a fundamental property of materials that relates to their ability to become magnetized in the presence of a magnetic field. It is defined as the ratio between the magnetic flux density (B) and the magnetic field strength (H). In other words, it is a measure of how easily a material can be magnetized.

The physical meaning of permeability can be understood by considering the behavior of a material in the presence of a magnetic field. When a material is placed in a magnetic field, the magnetic field lines pass through the material and cause its atoms and molecules to align in the direction of the field. This alignment results in the material becoming magnetized, with its own magnetic field.

The permeability of a material determines how easily this alignment and magnetization can occur. Materials with high permeability, such as iron, are easily magnetized and can retain a strong magnetic field even after the external field is removed. On the other hand, materials with low permeability, such as air or water, are not easily magnetized and do not retain a strong magnetic field.

Permeability is an important concept in many areas of science and technology, including electromagnetism, materials science, and engineering. It is used to understand and predict the behavior of magnetic materials and to design and optimize devices such as transformers, motors, and generators.

In summary, permeability is a measure of a material's ability to become magnetized in the presence of a magnetic field. It plays a crucial role in understanding and utilizing the properties of magnetic materials and is essential for many applications in science and technology.