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 Author Topic: Electric field  (Read 9067 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Rare
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no secretcode:ntnujava/log:1254222188

 « Embed this message on: October 03, 2009, 06:30:02 pm » posted from:Dallas,Texas,United States

May i request for 2D simulation that have the purpose of showing theoretical predictions from Coulomb's law ( recall and use Coulomb's law in the form F = Q1Q2/4πε_or ^2 for the force between two point charges in free space or air), please? I would like all parameters to be changed. I would like F to be calculate. Unit of Q in C, unit of r in m, unit of ε_o in Fm^-1 & unit of F in N. Thank you so much
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Fu-Kwun Hwang
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 « Embed this message Reply #1 on: October 03, 2009, 10:09:41 pm » posted from:Taipei,T\'ai-pei,Taiwan

What you need is a calculator.
Coulomb can be expressed as $\vec{F}=\frac{KQ_1Q_2}{r^2} \hat{r}$
where $K=9\times 10^9$.

What you want is not realistic.
For example: It is not easy to accumuate charge as at one point with charge 1C.
If there are two charge both are 1C and separate by 1m, the force between them is $9\times 10^9N$
,which is also like the weight of mass=$9\times 10^8 kg$.  This is not realistic. There is no way you can hold those two chartge at fix 1m distance.

I do not understand what is the purpose of your request?
If you just need to practice the calculation, you should just use a calculator.
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Rare
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no secretcode:ntnujava/log:1254222188

 « Embed this message Reply #2 on: October 04, 2009, 10:16:13 pm » posted from:Dallas,Texas,United States

my purpose is for inquiry learning.
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Fu-Kwun Hwang
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 « Embed this message Reply #3 on: October 04, 2009, 11:12:54 pm » posted from:Taipei,T\'ai-pei,Taiwan

What you want user to be able to do with it and what you hope user can learn from it?
Are you a teacher? Could you shom me what might be the worksheet or learning activities look like?

If I can fully understand what you really want, I would be able to produce simulations really fit with what you need.
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lookang
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http://weelookang.blogspot.com

 « Embed this message Reply #4 on: October 05, 2009, 09:56:41 pm » posted from:,,Satellite Provider

May i request for 2D simulation that have the purpose of showing theoretical predictions from Coulomb's law ( recall and use Coulomb's law in the form F = Q1Q2/4πε_or ^2 for the force between two point charges in free space or air), please? I would like all parameters to be changed. I would like F to be calculate. Unit of Q in C, unit of r in m, unit of ε_o in Fm^-1 & unit of F in N. Thank you so much

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=539.0

Hi Rare,
maybe u need this applet as the base for your request.
so now you can add the forces on the 2 charges?
is this what you want?
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Rare
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no secretcode:ntnujava/log:1254222188

 « Embed this message Reply #5 on: October 05, 2009, 11:30:09 pm » posted from:Dallas,Texas,United States

May i request for 2D simulation that have the purpose of showing theoretical predictions from Coulomb's law ( recall and use Coulomb's law in the form F = Q1Q2/4πε_or ^2 for the force between two point charges in free space or air), please? I would like all parameters to be changed. I would like F to be calculate. Unit of Q in C, unit of r in m, unit of ε_o in Fm^-1 & unit of F in N. Thank you so much
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=539.0
Hi Rare,
maybe u need this applet as the base for your request.
so now you can add the forces on the 2 charges?
is this what you want?
yes thank you
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"Reflect, review and renew constantly." ...Wisdom