File:VFPt maxwell coil.svg
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Size of this PNG preview of this SVG file: 800 × 600 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,280 × 960 pixels | 2,560 × 1,920 pixels.
Original file (SVG file, nominally 800 × 600 pixels, file size: 43 KB)
Summary
| Description |
English: Magnetic field around a maxwell coil consisting of three round current loops symetric around their common axis. This arrangement removes variations in the magnetic field, up to its 6th-order derivative with respect to the center. 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. |
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| Date | |||
| Source | Own work | ||
| Author | Geek3 | ||
| SVG development |
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| Source code | SVG code# 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()
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Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
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. |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:42, 13 March 2018 | | 800 × 600 (43 KB) | wikimediacommons>Geek3 | smaller symbols for smaller currents |
File usage
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