File:VFPt charges plus minus thumb potential.svg
| Uploaded by | Geek3 |
|---|---|
| Upload date | 2019-09-07T22:37:33Z |
| MIME type | image/svg+xml |
| Dimensions | 220 × 165 px |
| File size | 31.1 KB |
Summary
| Description |
English: Accurately computed electric field of a positive and a negative point charge. Thumbnail version. The electric potential is shown as the background color. |
| Date | |
| Source | Own work |
| Author | Geek3 |
| Other versions |
 |
| SVG development |  This plot was created with VectorFieldPlot. |
| Source code | Python codedoc = FieldplotDocument('VFPt_charges_plus_minus_thumb_potential',
width=220, height=165, unit=30., commons=True)
charges = [{'x':-1, 'y':0, 'Q':1}, {'x':1, 'y':0, 'Q':-1}]
field = Field([ ['monopole', par] for par in charges])
doc.draw_charges(field, scale=11./14.)
# draw potential in background
U0 = field.V(sc.array([-1. - 15./30. * 11./14., 0.]))
doc.draw_scalar_field(func=field.V, cmap=doc.cmap_AqYlFs, vmin=-U0, vmax=U0)
nlines = 16
for iline in range(nlines):
a = 2.0 * pi * (0.5 + iline) / nlines
if fabs(iline - (nlines - 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, 'fixed_ends':fix, 'scale':1.4,
'offsets':{'start':0.65, 'leave_image':0.5, 'enter_image':0.5, 'end':0.65} })
doc.write()
|
Licensing
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