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August 25, 2019, 08:46:05 pm

"That their main business was not put into the mind knowledge which was not there before, but to turn the mind's eye towards light so that it might see for itself." ...Plato's advice to educators(429-347BC)

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 Author Topic: Electric field  (Read 8751 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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"That their main business was not put into the mind knowledge which was not there before, but to turn the mind's eye towards light so that it might see for itself." ...Plato's advice to educators(429-347BC)