File:VFPt imagecharge plane horizontal plusminus.svg
From KYNNpedia
Size of this PNG preview of this SVG file: 500 × 600 pixels. Other resolutions: 200 × 240 pixels | 400 × 480 pixels | 640 × 768 pixels | 853 × 1,024 pixels | 1,707 × 2,048 pixels.
Original file (SVG file, nominally 500 × 600 pixels, file size: 23 KB)
Summary
| Description |
English: Field of a positive electric charge in front of a horizontal perfectly conducting metal surface. The field outside the metal can be constructed using an image charge behind the metal surface. The image charge is shown below. The field lines inside the metal do not exist in reality. Instead there's no field inside the metal and the charges are located at the surface instead of below. |
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| Date | |||
| Source | Own work | ||
| Author | Geek3 | ||
| Other versions | |||
| SVG development |  This W3C-invalid vector image was created with Inkscape, or with something else.
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| Source code | SVG code# paste this code at the end of VectorFieldPlot 1.01
doc = FieldplotDocument('VFPt_imagecharge_plane_horizontal_plusminus', width=500, height=600, commons=True)
field = Field({'monopoles':[[0,1.5,1], [0,-1.5,-1]]})
doc.draw_charges(field, scale=1.5)
xy = lambda phi: sc.array([0,1.5]) + rot([0,1], phi)
Fs = ig.quad(lambda phi: sc.dot(rot([0,1], phi), field.F(xy(phi))), 0, 2*pi)[0]
n = 22
for i in range(n):
a = float(i) / n
phi = op.brentq(lambda phi1: ig.quad(lambda phi: sc.dot(rot([0,1], phi), field.F(xy(phi))), 0, phi1)[0] - a * Fs, 0, 2*pi)
line = FieldLine(field, xy(phi), maxr=10,
directions='both', bounds_func=lambda p: -p[1])
doc.draw_line(line, arrows_style={'max_arrows':1, 'offsets':[0.6,0.4,0.4,0.6]})
line = FieldLine(field, [xy(phi)[0], -xy(phi)[1]], maxr=10,
directions='both', bounds_func=lambda p: p[1])
doc.draw_line(line, arrows_style=None,
attributes=[['stroke-dasharray', '0.08,0.12'], ['stroke-linecap', 'butt']])
# draw the metal surface
metal_surface = doc.draw_object('g', {'id':'metal_surface'})
defs = doc.draw_object('defs', {}, group=metal_surface)
grad = doc.draw_object('linearGradient', {'id':'metal_grad', 'x1':0, 'x2':0,
'y1':0, 'y2':1, 'gradientUnits':'objectBoundingBox'}, group=defs)
for of, op in ((0, 0), (1, 1)):
doc.draw_object('stop', {'offset':of, 'stop-color':'#bbb', 'stop-opacity':op}, group=grad)
doc.draw_object('rect', {'x':-2.5, 'y':-0.8, 'width':5, 'height':0.8, 'style':'fill:url(#metal_grad); stroke:none'}, group=metal_surface)
doc.draw_object('path', {'d':'M -2.5,0 H 2.5', 'style':'fill:none; stroke:#000; stroke-width:0.04'}, group=metal_surface)
doc.write()
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Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the Creative Commons Attribution 3.0 Unported 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.
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:23, 20 June 2010 | | 500 × 600 (23 KB) | wikimediacommons>Geek3 | VFPt_imagecharge_plane_horizontal_plusminus |
File usage
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