- #1

Chadvad

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I have made an electromagnet by taking a 99.99% pure iron (5cm in length and 1 mm in radius) and wrapping wire over it. I have measured it's magnetic field at the end and cannot find an equation from literature (Biot -Savart) that accurately models the magnetic field as I move the gaussmeter farther from one end (referring to moving the instrument further along the z direction in the picture I uploaded).

I know that the permeability of the iron is 2.5x10e-1 from a wikipedia chart on permeability

https://en.wikipedia.org/wiki/Permeability_(electromagnetism).

I have been using a formula that I found here, but does not seem to be working since it only applies to air core solenoids.

Does anyone have an idea on how I can more closely model/ create an equation for this relationship?

Thanks