lookang
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on: June 14, 2009, 11:39:57 am » posted from:Singapore,,Singapore |
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 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 |
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 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 spherehttp://www.phy.ntnu.edu.tw/ntnujava/swf/jacob.swfThe 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.
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lookang
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Reply #2 on: June 14, 2009, 06:05:22 pm » |
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 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 
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lookang
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Reply #3 on: June 14, 2009, 06:11:51 pm » |
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 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
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Fu-Kwun Hwang
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Reply #4 on: June 14, 2009, 09:32:21 pm » posted from:Taipei,T\'ai-pei,Taiwan |
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 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 |
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 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 |
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 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 |
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 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 |
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 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.
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« 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 |
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 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?
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« 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 |
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 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.
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lookang
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Reply #12 on: June 21, 2009, 11:55:28 pm » posted from:Singapore,,Singapore |
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 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.
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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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