File:VFPt Earths Magnetic Field Confusion.svg
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Original file (SVG file, nominally 320 × 300 pixels, file size: 17 KB)
Summary
| Description |
English: Magnetic field around a spherical dipole magnet like the earth with a schematic dipole magnet drawn to its center. |
| Date | |
| Source | Own work |
| Author | Geek3 |
| Other versions | Earths Magnetic Field Confusion.svg |
| SVG genesis | |
| Source code | Python code# paste this code at the end of VectorFieldPlot 3.1
doc = FieldplotDocument('VFPt_Earths_Magnetic_Field_Confusion',
commons=True, width=320, height=300, unit=15)
phi = radians(-70.0)
r = 1.0
Lhalf = 2.0
field = Field([ ['coil', {'x':0, 'y':0, 'phi':phi, 'R':r, 'Lhalf':Lhalf, 'I':1}] ])
n = 11
for i in range(n):
a = -1.0 + 2.0 * (i + 0.5) / n
line = FieldLine(field, [sin(phi)*a*r, -cos(phi)*a*r], directions='both', maxr=30)
doc.draw_line(line, linewidth=2, arrows_style={'scale':1.2, 'at_potentials':[0],
'potential':lambda xy: (vabs(xy) - 8.0) * rot(xy, -phi)[0],
'condition_func':lambda xy: (fabs(rot(xy, -phi)[0]) > Lhalf) or
(fabs(rot(xy, -phi)[1]) > r)})
doc.draw_object('circle', {'r':'6', 'cx':'0', 'cy':'0',
'style':'fill:#add8e6; stroke:#0000ff; stroke-width:0.066667'},
bg=True)
doc.draw_magnets(field)
doc.write()
|
Licensing
I, the copyright holder of this work, hereby publish it under the following licences:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation Licence, 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 licence is included in the section entitled GNU Free Documentation Licence. |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported licence.
- 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 licence, 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 | 15:34, 29 May 2020 | | 320 × 300 (17 KB) | wikimediacommons>Geek3 | more uniform distribution of arrows |
File usage
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