File:VFPt rotating-charged-sphere-approx-(rings,7-wires).svg
| Uploaded by | MikeRun |
|---|---|
| Upload date | 2021-04-02T11:09:26Z |
| MIME type | image/svg+xml |
| Dimensions | 600 × 600 px |
| File size | 78.5 KB |
Summary
| Description |
English: appoximate magnetic field of a rotating charged sphere (7 ringcurrents; current decreases with cos() to the poles) |
| Date | |
| Source | Own work |
| Author | MikeRun |
| Other versions |
.svg) |
| SVG development |  This plot was created with VectorFieldPlot. |
| Source code | Python code# paste this code at the end of VectorFieldPlot 3.0
import math
doc = FieldplotDocument('VFPt_rotating-charged-sphere-approx-(7-wires)', width=600, height=600, commons=True)
additional_wires_per_hemisphere = 3
total_wires = 2*additional_wires_per_hemisphere+1
sphere_radius = 1
current_max = 1
currents = [[0,0,0,sphere_radius,current_max]]
phi = math.pi/(2*total_wires)
for i in range(additional_wires_per_hemisphere):
for j in [-1,1]:
currents.append([j*math.sin((2*(i+1))*phi)*sphere_radius,0,0,math.cos((2*(i+1))*phi)*sphere_radius,math.cos((2*(i+1))*phi)*current_max])
field = Field({'ringcurrents':currents})
for x0, y0, off in [[-0.3719,-1.2553,0], [0.3719,-1.2553,0],
[0.,-0.9802,0], [0.,-0.7820,0], [0.,-0.6297,.5], [0.,-0.4882,.5],
[0.,-0.3490,.5], [0.,-0.2098,.5], [0.,-0.0700,.5], [0.,0.0700,.5],
[0.,0.2098,.5], [0.,0.3490,.5], [0.,0.4882,.5], [0.,0.6297,.5],
[0.,0.7820,0], [0.,0.9802,0], [-0.3719,1.2553,0], [0.3719,1.2553,0]]:
line = FieldLine(field, [x0, y0], directions='both', maxr=5)
doc.draw_line(line, arrows_style={'dist':2,
'min_arrows':1, 'max_arrows':4, 'offsets':[off,0.5,0.5,1.0-off]})
doc.draw_currents(field)
doc.write()
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-180.svg)
-180.svg)
Licensing
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