File:VFPt four charges.svg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (SVG file, nominally 600 × 600 pixels, file size: 28 KB)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description
English: Field of two positive and two negative point charges constituting a non-ideal electric quadrupole.
Date
Source Own work
Author Geek3
SVG development
InfoField
 
The SVG code is valid.
 
This plot was created with VectorFieldPlot.
Source code
InfoField

Python code

# paste this code at the end of VectorFieldPlot 1.0
doc = FieldplotDocument('VFPt_four_charges', width=600, height=600, commons=True)
field = Field({'monopoles':[[-1,0,-1], [0,1,1], [1,0,-1], [0,-1,1]]})
doc.draw_charges(field)
n = 8
Fsum = ig.quad(lambda t: sc.dot(field.F([.5*sin(t), 1-0.5*cos(t)]),
    [sin(t), -cos(t)]), 0, pi)[0]
for i in range(n):
    a = (i + 0.5) / n
    w = op.brentq(lambda w: ig.quad(lambda t: sc.dot(field.F([0.5*sin(t),
    	1-0.5*cos(t)]), [sin(t), -cos(t)]), 0, w)[0] - a * Fsum, 0, pi)
    for w1 in range(4):
    	line = FieldLine(field, rot([.5*sin(w), 1.0-0.5*cos(w)], w1 * pi/2),
    	    directions='both')
    	doc.draw_line(line, arrows_style={'dist':1.5})
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
current14:24, 29 April 2017Thumbnail for version as of 14:24, 29 April 2017600 × 600 (28 KB)Geek3 (talk | contribs)validator fix
21:44, 31 May 2010Thumbnail for version as of 21:44, 31 May 2010600 × 600 (28 KB)Geek3 (talk | contribs)VFPt_four_charges

You cannot overwrite this file.

The following 2 pages use this file:

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:VFPt_four_charges.svg&oldid=648540123"