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## Homework Statement

A ferromagnetic core is shown the figure below. The depth of the core is 5 cm. The other

dimensions of the core are as shown in the figure. Find the value of the current that will produce a flux of 0.003 Wb. With this current, what is the flux density at the top of the core? What is the flux density at the right side of the core? Assume that the relative permeability of the core is 1000.

## Homework Equations

R=l/μA

## The Attempt at a Solution

So I know to use this equation R=l/μA and I get what μ is and based on a similar problem in my book I also know what to do after I get Req. However what I am stuck on is how to get the mean path length l and the cross sectional areas A. I also know from the problem in the book I am supposed to seperate it into different regions but how exactly do I do this?