Which of the following magnetic materials has the highest relucta

SOLUTION

Concept:

Reluctance: This is a property of a material that opposes the magnetic field lines.

This is an analogy with the resistance in electric circuits.

Reluctance is defined as:

\(\frac{{MMF}}{{flux}} = \frac{{Ni}}{\phi }\) 

The magnetic strength of materials in ascending order is:

Dia < Para < Ferri < Ferro

Reluctance is the inverse of magnetic strength, i.e. the reluctance in ascending order is:

Ferro < Ferri < Para < Dia

Conclusion:

Diamagnetic materials have the highest reluctance.