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## Homework Statement

For the magnetic circuit:

Derive the circuit approximation.

Compute all magnetic fluxes if the total solenoid current is I.

## Homework Equations

R

_{m}= L / μS

## The Attempt at a Solution

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Mostly, right now, I'm just trying to determine the magnetic circuit equivalent. From there it seems like simple circuit analysis. (Note that in my recreation of the diagram, I failed to add in the small L5 annotated at the top right of the larger subcircuit).

Is my intuition correct in treating the different media as a parallel of three resistances? This one is a bit strange, I can't find any solid worked examples of this type with differing media.

edit: The two resistances Rg1 and Rg2 represent the air-gap.