[tex]B = uNI/2L * (L/2/(\sqrt{((L/2)^2)+R^2)} - (-L/2/(\sqrt{((-L/2))^2+R^2))}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

I get.. [tex]B = uNI/2R[/tex] (for those wondering, this is the equation to find the magnetic field when a Hall probe is placed in the center of a solenoid)

they ask me to figure out the % diffeerence between the field at the center of the solenoid compared to a solenoid that infinitely long (where B = uNI)..

I get L = 28cm, R = 2.69cm, I = 1.25A

i get 520% when using my simplified formula >_<

is this right???

and i dont even use the current!

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# Homework Help: Please help me simplify this equation >_<

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