lookang
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on: June 14, 2009, 11:39:57 am » posted from:Singapore,,Singapore
An insulated uncharged metal object M is brought near but not touching and insulated positively charged metal sphere S.
Which of the following diagrams best illustrates the final distribution of charges on S and on M?
I thought this is an applet not made yet on this forum.
for your consideration
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Fu-Kwun Hwang
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Reply #1 on: June 14, 2009, 01:34:54 pm » posted from:Taipei,T\'ai-pei,Taiwan
Please check out
JaCoB .
Click
Electricity at the right frame, then click
Two cylinders .
May be it is what you want. There are a lots of possibility with JaCoB.
The following is a demo. You can also check out
Image charge: point cgarge and a sphere http://www.phy.ntnu.edu.tw/ntnujava/swf/jacob.swf The following is a JaCoB applet. Move your mouse inside and
right click for menu to generate objects, charges ...etc.
-*-
Check out attached image!
Download jacob.zip and open Jacob.htm with your browser.
lookang
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Reply #2 on: June 14, 2009, 06:05:22 pm »
Simply awesome!
Thanks!, JaCoB applet is the best for this purpose for students to try to figure out themselves.
I managed to follow your video to get the same effect setup as in the question.
http://www.phy.ntnu.edu.tw/demolab/CoLoS/JaCob/ I have to make a video about this when time permits. It is super powerful
The embedded applet appears to be of a different character system? i see squares for the english words
lookang
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Reply #3 on: June 14, 2009, 06:11:51 pm »
Another thing to note is after clicking the examples, the files are not found, perhaps need to upload the html files?
http://www.phy.ntnu.edu.tw/demolab/CoLoS/JaCob/ Electricity
1. Cylinder near conductive corner
2. Electrometer
3. Actin and Myosin
4. Cylinder
5. Rectangle
6. Two cylinders
7. Two rectangles
8. Franklin experiment - I
9. Franklin experiment - II
10. Electric shadow
11. Dipole in electric field
12. Insulator in electric field
13. Friction electricity
14. Semiconductor and PN junction
15. Capacitor and generator
16. Concentric cable
17. Lightening rode
18. Plate capacitor and dipole
19. Cylindrical capacitor and insulator
20. Van de Graaff accelerator
21. Cylinder, el. charge and grounding
22. Biological cell ionic channel (under construction)
23. Acolos
Not Found
The requested URL /demolab/CoLoS/JaCob/expel/evogal.html was not found on this server.
Apache/2.2.11 (Debian) PHP/5.2.6-3 with Suhosin-Patch Server at
www.phy.ntnu.edu.tw Port 80
Fu-Kwun Hwang
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Reply #4 on: June 14, 2009, 09:32:21 pm » posted from:Taipei,T\'ai-pei,Taiwan
Sorry! It was due to Lowercase/Uppercase filename problem.
It is fixed now. Please let me know if you found more problems. Thanks!
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lookang
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Reply #5 on: June 14, 2009, 09:46:21 pm » posted from:Singapore,,Singapore
the 2 problems still there
The Electricity cases are not viewable
Not Found
The requested URL /demolab/CoLoS/JaCob/expel/evogal.html was not found on this server.
Apache/2.2.11 (Debian) PHP/5.2.6-3 with Suhosin-Patch Server at
www.phy.ntnu.edu.tw Port 80
and the embedded applet in the post above show squares
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Fu-Kwun Hwang
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Reply #6 on: June 14, 2009, 10:06:58 pm » posted from:Taipei,T\'ai-pei,Taiwan
It seems that you were viewing the cached html page.
The URL has been changed to EVogal.html
You might need to reload the page.
English should be the default code for applet. I will check out what might cause the problem.
The file was link to a Chines version jar. I changed the above tag to iframe. It should display english version now.
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lookang
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Reply #7 on: June 15, 2009, 07:54:35 am » posted from:SINGAPORE,SINGAPORE,SINGAPORE
fantastic Stuff!
thanks! This is amazing, Good Job Prof. Hwang.
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lookang
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Reply #8 on: June 20, 2009, 07:24:45 pm » posted from:Singapore,,Singapore
Hi prof, i read that
http://www.phy.ntnu.edu.tw/demolab/CoLoS/JaCob/GNUgpl.htm //==============================================================================
//
// Copyright (C) 2000 Vojko Valencic
// Savin Zlobec // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // //============================================================================== i am interested create a download-able jacob applet for education purpose, it is possible to zip it as an attachment? thanks! btw it seems http://www.phy.ntnu.edu.tw/ntnujava/index.php have the only working copy of jacob in the free internet space.http://webphysics.davidson.edu/applets/jacob/intro.html is not working properly.
« Last Edit: June 20, 2009, 07:29:32 pm by lookang »
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lookang
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Reply #10 on: June 21, 2009, 10:00:16 pm » posted from:Singapore,,Singapore
i saved the html from internet explorer 8
i download jacob.jar too.
but it had some errors
i followed the error message and download extra files
lang.data
property.data
into the data folder
but it still not working.
i zip it for u to test?
think still missing some files?
*** There are 1 more attached files. You need to login to acces it!
« Last Edit: June 21, 2009, 10:01:47 pm by lookang »
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Fu-Kwun Hwang
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Reply #11 on: June 21, 2009, 11:01:47 pm » posted from:Taipei,T\'ai-pei,Taiwan
I just added ui.data under data subdirectory and it work for my firefox.
I also found scriptmanual.pdf (it is attached,too)
Complete zip file has been upload at the second post.
*** There are 2 more attached files. You need to login to acces it!
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lookang
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Reply #12 on: June 21, 2009, 11:55:28 pm » posted from:Singapore,,Singapore
In memory of Vojko Valencic, i have created the zip file to be shared as the way he licensed it.
http://www.phy.ntnu.edu.tw/demolab/CoLoS/JaCob/ //==============================================================================
//
// Copyright (C) 2000 Vojko Valencic
// Savin Zlobec // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*** There are 1 more attached files. You need to login to acces it!
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UKLN8860
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Reply #13 on: November 22, 2009, 06:21:23 pm » posted from:Bangkok,Krung Thep,Thailand
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