- #1

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You can write the magnetic field at anyone point in between the two bars as

(u*I)/(2*pi) * (1/r + 1/(d-r))

where u is mu, d is distance between the bars, I is the current, and r is the distance from the center of one bar to the point of interest.

I assume that I need to compute some form of integral but I'm not sure exactly what to integrate over and how to obtain the average field strength from that.

I found a website that details how they went about it but I still am not sure on why the way they did it works. Here is the link.

https://military-history.fandom.com/wiki/Railgun