File:VFPt four wires antiparallel Babs+contour.svg
![File:VFPt four wires antiparallel Babs+contour.svg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/VFPt_four_wires_antiparallel_Babs%2Bcontour.svg/600px-VFPt_four_wires_antiparallel_Babs%2Bcontour.svg.png?20201112114434)
Original file (SVG file, nominally 600 × 600 pixels, file size: 172 KB)
Captions
Captions
Summary
[edit]DescriptionVFPt four wires antiparallel Babs+contour.svg |
English: Magnetic field of four infinite wires perpendicular to the image plane, conducting current into and out of the image plane in a quadrupole configuration. The absolute magnetic field strength is shown as background contour plot. |
Date | |
Source | Own work |
Author | Geek3 |
Other versions | VFPt four wires antiparallel.svg |
SVG development InfoField | ![]() This plot was created with VectorFieldPlot. |
Source code InfoField | Python code# paste this code at the end of VectorFieldPlot 3.2
# https://commons.wikimedia.org/wiki/User:Geek3/VectorFieldPlot
doc = FieldplotDocument('VFPt_four_wires_antiparallel_Babs+contour', width=600, height=600, commons=True)
nw = 4
r = 1.65
wires = []
for i in range(nw):
wires.append(['wire', {'x':r * cos(2*pi*(i+0.5)/nw),
'y':r * sin(2*pi*(i+0.5)/nw),
'I':2 * (i % 2) - 1}])
field = Field(wires)
def Babs(xy):
return sc.linalg.norm(field.F(xy))
B0 = Babs(((r-0.15)*cos(pi/4), (r-0.15)*sin(pi/4)))
doc.draw_scalar_field(func=Babs, cmap=doc.cmap_WtGnBu, vmin=0., vmax=B0)
doc.draw_contours(func=Babs, linewidth=1, linecolor='#111111',
levels=sc.linspace(0, B0, 12)[1:-1], attributes={'opacity':'0.5'})
doc.draw_currents(field)
startpath = Startpath(field, lambda t: array((t * 0.89*r*cos(pi/4), t * 0.89*r*sin(pi/4))))
nlines = 7
for iline in range(nlines):
p0 = startpath.startpos((iline + 0.5) / (nlines - 0.5))
if iline == 5 or iline == 2:
offs = 0.0
else:
offs = 0.5
for m in range(4):
line = FieldLine(field, rot(p0, 2*pi*m/nw), directions='both')
doc.draw_line(line, linewidth=2.4, arrows_style={'dist':1.8,
'offsets':{'start':offs, 'end':1-offs} })
doc.write()
|
Licensing
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- to share – to copy, distribute and transmit the work
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- Under the following conditions:
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 11:44, 12 November 2020 | ![]() | 600 × 600 (172 KB) | Geek3 (talk | contribs) | Uploaded own work with UploadWizard |
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Short title | VFPt_four_wires_antiparallel_Babs+contour |
---|---|
Image title | VFPt_four_wires_antiparallel_Babs+contour
created with VectorFieldPlot 3.2 https://commons.wikimedia.org/wiki/User:Geek3/VectorFieldPlot about: https://commons.wikimedia.org/wiki/File:VFPt_four_wires_antiparallel_Babs+contour.svg rights: Creative Commons Attribution ShareAlike 4.0 |
Width | 600 |
Height | 600 |