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File:VFPt charges plus minus thumb.svg

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Original file ‎(SVG file, nominally 220 × 165 pixels, file size: 18 KB)

Captions

Captions

Electric field of two opposite charges

Summary[edit]

Description
English: Field of a positive and a negative point charge. Thumbnail version
Date
Source Own work
Author Geek3
Other versions

VFPt charges plus minus.svg (full size version)

VFPt_charges_plus_minus_thumb_potential.svg (with electric potential)
SVG development
InfoField
 
The SVG code is valid.
 
This vector image was created with Inkscape, or with something else.

Quality image

This image has been assessed using the Quality image guidelines and is considered a Quality image.

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Source code
InfoField

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()


Licensing[edit]

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
attribution share alike
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.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current19:12, 14 March 2020Thumbnail for version as of 19:12, 14 March 2020220 × 165 (18 KB)Geek3 (talk | contribs)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.
19:41, 21 February 2020Thumbnail for version as of 19:41, 21 February 2020220 × 165 (3 KB)Jarvisa (talk | contribs)Simplified SVG source
22:43, 7 September 2019Thumbnail for version as of 22:43, 7 September 2019220 × 165 (21 KB)Geek3 (talk | contribs)validator fix
20:24, 6 June 2010Thumbnail for version as of 20:24, 6 June 2010220 × 165 (21 KB)Geek3 (talk | contribs)VFPt_charges_plus_minus_thumb

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