File:VFPt maxwell coil.svg
Summary
{{Information
|description=
The radius of the small loops is times the radius of the big coils. The axial distance of the small loops from the big loop is times the radius of the big coils. The current through the small loops is 49/64 times the current through the big loop.
|source=Own work |author=Geek3 |date=2010-05 |other fields={{Igen|^|VectorFieldPlot|0|+|c1=
- paste this code at the end of VectorFieldPlot 1.0
doc = FieldplotDocument('VFPt_maxwell_coil', width=800, height=600, commons=True) field = Field({'ringcurrents':[[0,0,0,sqrt(1.75),1],
[-sqrt(0.75),0,0,1,49./64.], [sqrt(0.75),0,0,1,49./64.]]})
y0 = sqrt(1.75) - 0.14 s = ig.quad(lambda y: field.F([0.0, y])[0], -y0, y0)[0] n = 17 for i in range(n):
a = i / (n - 1.)
y = op.brentq(lambda y1: ig.quad(lambda y: field.F([0.0, y])[0], -y0, y1)[0] - a * s, -y0, y0)
if i == 2 or i == n - 3: of = 0.0
else: of = 0.5
line = FieldLine(field, [0.0, y], directions='both', maxr=20.0)
doc.draw_line(line, arrows_style={'dist':1.9, 'offsets':[0+of, 0.5, 0.5, 1-of]})
doc.draw_currents(Field({'ringcurrents':[ [-sqrt(0.75),0,0,1,49./64.],
[sqrt(0.75),0,0,1,49./64.]]}), scale=sqrt(49./64.))
doc.draw_currents(Field({'ringcurrents':[ [0,0,0,sqrt(1.75),1]]})) doc.write() }} }}
Licensing
 |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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