File:VFPt charges plus minus thumb.svg
From Vigyanwiki
Size of this PNG preview of this SVG file: 220 × 165 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 220 × 165 pixels, file size: 18 KB)
Summary
| Description |
English: Field of a positive and a negative point charge. Thumbnail version |
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| Date | |||
| Source | Own work | ||
| Author | Geek3 | ||
| Other versions |
VFPt charges plus minus.svg (full size version) |
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| SVG genesis |  This vector image was created with Inkscape, or with something else.
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| Source code | SVG code# paste this code at the end of VectorFieldPlot 2.5
doc = FieldplotDocument('VFPt_charges_plus_minus_thumb',
width=220, height=165, unit=30., commons=True)
field = Field([['monopole', {'x':-1, 'y':0, 'Q':1}],
['monopole', {'x':1, 'y':0, 'Q':-1}]])
doc.draw_charges(field, scale=11./14.)
n = 16
for i in range(n):
a = 2.0 * pi * (0.5 + i) / n
if abs(i - (n-1)/2.) > 6:
fix = {'start':False, 'leave_image':False, 'enter_image':False, 'end':False}
else:
fix = {'start':True, 'leave_image':False, 'enter_image':False, 'end':True}
line = FieldLine(field, [-1,0], start_v=[cos(a), sin(a)],
directions='forward')
doc.draw_line(line, linewidth=1.0, arrows_style={
'dist':1.6, 'min_arrows':1, 'offsets':
{'start':.65,'leave_image':.5,'enter_image':.5,'end':.65},
'fixed_ends':fix, 'scale':1.4})
doc.write()
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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.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.
You may select the licence of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:42, 15 March 2020 | | 220 × 165 (18 KB) | wikimediacommons>Geek3 | I appreciate the compression. However, 18kB savings in the source code are no relevant advantage. The original image has a clear internal structure for simple reusability. It contains useful meta information. The approximation of lines by straight segments is the most simple one, and it is more precise than the "simplified" version with Beziers. Note e.g. that the arrows should be centered on each line. |
File usage
The following 3 pages use this file:
