VFPt_metal_ball_grounded.svg

Summary

Description
English: Field of a positive point charge influenced by a grounded conducting metal sphere.
Date
Source Own work
Author Geek3
Other versions
SVG development
InfoField
The source code of this SVG is invalid due to VectorFieldPlot errors.
This W3C- invalid vector image was created with Inkscape , or with something else .

Quality image

This image has been assessed using the Quality image guidelines and is considered a Quality image .

العربية ∙ جازايرية ∙ беларуская ∙ беларуская (тарашкевіца) ∙ български ∙ বাংলা ∙ català ∙ čeština ∙ Cymraeg ∙ Deutsch ∙ Schweizer Hochdeutsch ∙ Zazaki ∙ Ελληνικά ∙ English ∙ Esperanto ∙ español ∙ eesti ∙ euskara ∙ فارسی ∙ suomi ∙ français ∙ galego ∙ עברית ∙ हिन्दी ∙ hrvatski ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ Jawa ∙ ქართული ∙ 한국어 ∙ kurdî ∙ Lëtzebuergesch ∙ lietuvių ∙ македонски ∙ മലയാളം ∙ मराठी ∙ Bahasa Melayu ∙ Nederlands ∙ Norfuk / Pitkern ∙ polski ∙ português ∙ português do Brasil ∙ rumantsch ∙ română ∙ русский ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ shqip ∙ српски / srpski ∙ svenska ∙ தமிழ் ∙ తెలుగు ∙ ไทย ∙ Tagalog ∙ Türkçe ∙ toki pona ∙ українська ∙ vèneto ∙ Tiếng Việt ∙ 中文 ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Source code
InfoField

SVG code

VectorFieldPlot source code 
# paste this code at the end of VectorFieldPlot 1.1
u = 120.0
doc = FieldplotDocument('VFPt_metal_ball_grounded', commons=True,
    width=600, height=600, center=[320, 300], unit=u)
# draw symbols
field = Field({'monopoles':[[-1,0,1]]}); doc.draw_charges(field)
field = Field({'monopoles':[[0.5,0,-0.5]]}); doc.draw_charges(field, scale=sqrt(0.5))
ball = doc.draw_object('g', {'id':'metal_ball', 'transform':'translate(1,0)',
    'style':'fill:none; stroke:#000;stroke-linecap:square'})
# draw the rod
grad1 = doc.draw_object('linearGradient', {'id':'rod_shade', 'x1':0, 'x2':0,
    'y1':0, 'y2':1, 'gradientUnits':'objectBoundingBox'}, group=ball)
for col, of in (('#666', 0), ('#ddd', 0.6), ('#fff', 0.7), ('#ccc', 0.75), ('#888', 1)):
    doc.draw_object('stop', {'offset':of, 'stop-color':col}, group=grad1)
doc.draw_object('rect', {'x':0.9, 'width':0.7, 'y':-0.1/1.2+0.01, 'height':0.2/1.2-0.02,
    'style':'fill:url(#rod_shade); stroke-width:0.02'}, group=ball)
# draw the metal ball
grad = doc.draw_object('radialGradient', {'id':'metal_spot', 'cx':'0.53', 'cy':'0.54',
    'r':'0.55', 'fx':'0.65', 'fy':'0.7', 'gradientUnits':'objectBoundingBox'}, group=ball)
for col, of in (('#fff', 0), ('#e7e7e7', 0.15), ('#ddd', 0.25), ('#aaa', 0.7), ('#888', 0.9), ('#666', 1)):
    doc.draw_object('stop', {'offset':of, 'stop-color':col}, group=grad)
doc.draw_object('circle', {'cx':0, 'cy':0, 'r':1,
    'style':'fill:url(#metal_spot); stroke-width:0.02'}, group=ball)
ball_charges = doc.draw_object('g', {'style':'stroke-width:0.01667'}, group=ball)
# draw actual field
field = Field({'monopoles':[[-1,0,1], [0.5,0,-0.5]]})
n = 23
for i in range(n):
    a = (0.5 + i) / n
    phi = 2*pi * a
    line = FieldLine(field, [-1,0], start_v=[cos(phi), sin(phi)], directions='forward')
    fe = [True, False, False, False]
    of = [0.5, 0.5, 0.5, 0.5]
    # make little charge signs
    if vabs(line.get_position(1) - sc.array([1,0])) < 1:
        t = op.brentq(lambda t: vabs(line.get_position(t) - sc.array([1,0]))-1, 0, 1)
        alpha = atan2(line.get_position(t)[1], line.get_position(t)[0]-1)
        doc.draw_object('path', {'d':'M {0:.5f},{1:.5f} h {2:.5f}'.format(
            round((u*(0.9*cos(alpha)))-2)/u,
            round(u*(0.9*sin(alpha)))/u, 4/u)}, group=ball_charges)
        if abs(i-(n-1.0)/2) < n/2-2:
            fe = [True, False, False, True]
            of = [0.5, 0.5, 0.5, (0.25+vabs(line.get_position(t)-sc.array([0.5,0]))) / 1.5]
    doc.draw_line(line, arrows_style={'dist':1.5, 'min_arrows': 1, 'offsets':of, 'fixed_ends':fe})
doc.write()

Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head 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 .
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 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.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

inception

June 2010

media type

image/svg+xml