File:VFPt minus thumb potential.svg
Summary
| Description |
English: Field of a negative point charge. Thumbnail version with potential shown as color from positive (aqua) to neutral (yellow). |
| Date | |
| Source | Own work |
| Author | Geek3 |
| SVG development | |
| Source code | Python codedoc = FieldplotDocument('VFPt_minus_thumb_potential',
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='backward', maxr=5)
doc.draw_line(line, linewidth=1.0, arrows_style={'dist':2, 'scale':2,
'max_arrows':1, 'offsets':{'end':1.0}, 'fixed_ends':{'end':True} })
U0 = fabs(field.V(sc.array([15./30., 0.])))
doc.draw_scalar_field(func=field.V, cmap=doc.cmap_AqYlFs, vmin=-U0, vmax=U0)
doc.write()
|
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