|Oct22-11, 03:40 PM||#1|
Magnetic Field around a dipole calculation
1. The problem statement, all variables and given/known data
I've attached a page from the book Elements of Electromagnetics.
I was wondering how he gets from eq.8.20 to eq.8.21a.
What I would have done is sub in dl=a.d∅.a∅ and integrate ∅ between 0 and 2pi.
This would then give you A=[(2.μ0.I.pi.a)/(4.pi.r)].a∅
This is obviously wrong because it's not what he got. He does make an assumption that r>>a so maybe i have to do something with that.
Any help would be much appreciated
|Oct22-11, 03:45 PM||#2|
I think i forgot the attachment
|Oct23-11, 10:47 AM||#3|
Its ok, i found the explanation in a book on google books. Its a bit long and tedious.
I guess no one here would be able to understand it which is why i got no reply. Oh well...
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