What is Reluctance? | applied electronics engineering

# What is Reluctance?

By Applied Electronics - Saturday, April 1, 2017 No Comments
What is Reluctance? In magnetism and magnetic phenomenon, reluctance is a something that opposes magnetic flux Ï†. It is similar to resistance in electricity. In electricity we have voltage or electromotive force and correspondingly when talking about reluctance we have magnetomotive
force or ampere-turns nI.

The mathematical relationship between magnetic flux magnetomotive force and reluctance is given by the following equation.

Compare this to Ohms' Law,

The current in electricity I, is similar to magnetic flux . The voltage V in electricity is similar to magnetomotive force or ampere turns nI, where n is the number of coil turns. And resistance R in electricity is similar to reluctance R in magnetism.

The reluctance of a physical material is given by the following formula,

Notice that is similar to the forumula for resistance with resistivity.

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