File:VFPt plus thumb potential+contour.svg

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Original file ‎(SVG file, nominally 180 × 180 pixels, file size: 32 KB)

Captions

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Summary[edit]

Description
English: Field of a positive point charge. Thumbnail version with potential shown as color from positive (fuchsia) to neutral (yellow) and equipotential lines.
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 3.1
# https://commons.wikimedia.org/wiki/User:Geek3/VectorFieldPlot
doc = FieldplotDocument('VFPt_plus_thumb_potential+contour',
    width=180, height=180, unit=30, commons=True)
field = Field([ ['monopole', {'x':0, 'y':0, 'Q':1}] ])
doc.draw_charges(field)
nlines = 16
for iline in range(nlines):
    a = 2.0 * pi * (0.5 + iline) / nlines
    line = FieldLine(field, [0, 0], start_v=[cos(a), sin(a)],
        directions='forward', maxr=5)
    doc.draw_line(line, linewidth=1.2, arrows_style={'dist':2, 'scale':1.8,
        'max_arrows':1, 'offsets':{'start':1.05}, 'fixed_ends':{'start':True} })

U0 = field.V(sc.array([15./30., 0.]))
U1 = field.V(sc.array([14.65/30., 0.]))
doc.draw_scalar_field(func=field.V, cmap=doc.cmap_AqYlFs, vmin=-U0, vmax=U0)
doc.draw_contours(func=field.V, linewidth=0.7, linecolor='#444444',
    levels=sc.linspace(0, U1, 12))
doc.write()

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International 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.

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Date/TimeThumbnailDimensionsUserComment
current11:00, 26 May 2020Thumbnail for version as of 11:00, 26 May 2020180 × 180 (32 KB)Geek3 (talk | contribs)Uploaded own work with UploadWizard

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