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File:VFPt dipole magnetic2.svg

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Original file(SVG file, nominally 600 × 600 pixels, file size: 22 KB)

Summary

Description
English: Magnetic dipole field around a small current loop.
Date
Source Own work
Author Geek3
Other versions
SVG developmentW3C grn.svg The source code of this SVG is valid.VectorFieldPlot symbol.svg This plot was created with VectorFieldPlot.

Python

VectorFieldPlot source code
# paste this code at the end of VectorFieldPlot 1.2
doc = FieldplotDocument('VFPt_dipole_magnetic2',
    commons=True, width=600, height=600)
field = Field({'ringcurrents':[[0,0,0,0.5,1]]})
n = 12
for i in range(n):
    a = 4.2 * ((i + 0.5) / n - 0.5)
    line = FieldLine(field, [0, 0.5 * (exp(a)-1) / (exp(a)+1)],
        directions='both')
    doc.draw_line(line, linewidth=2.4,
        arrows_style={'dist':1.7, 'scale':1.1, 'max_arrows':4})
        
# draw ring
symb = doc.draw_object('g', {'id':'ring',
    'transform':'scale({0},{0})'.format(1.0/doc.unit)})
defs = doc.draw_object('defs', {}, group=symb)
spot = doc.draw_object('radialGradient', {'id':'light_spot',
    'cx':'0.65', 'cy':'0.7', 'r':'0.75'}, group=defs)
for col, of in [['#fff', '0'], ['#ddd', '0.15'],
                ['#aaa', '0.5'], ['#444', '1']]:
    doc.draw_object('stop', {'stop-color':col, 'offset':of}, group=spot)
doc.draw_object('path',
    {'d':'M -20.5,50 V -50 A 20.5,20.5 0 0,1 20.5,-50 V 50 A 20.5,20.5 0 0,1 -20.5,50 Z',
    'style':'fill:url(#light_spot); stroke:#000000; stroke-width:3'},
    group=symb)

doc.write()

Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head 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.
w:en:Creative Commons

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  • 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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depicts

September 2010

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Date/TimeThumbnailDimensionsUserComment
current14:27, 28 September 2010Thumbnail for version as of 14:27, 28 September 2010600 × 600 (22 KB)Geek3own work
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