Re: Electrostatic field


Thanks for your answers. But as you know, for example,in a capacitor
the electric
field exist between the electrodes(plates), or we can say it is
ristricted there. what I need is an variable electric field like what
we see in a "Van de graaff" (that is limited just from one side).
In the other word, I want to have an electric field with this
specification that I could change its intensity (variable electrostatic
field). for example in the electromagnetic fields, you can change the
field's intensity by changing the current of the coil. So do you have
any idea for the electrostatic fields?

On Dec 26 2006, 6:12 pm, Meir Achuz
<Meir.Achuz.2jf...@xxxxxxxxxxxxxxxxx> wrote:
mohammad.esmae...@xxxxxxxxx Wrote:> Hi,
As you know there is an electricalfieldaround eachelectrostatic
charge. I know how to create anelectrostaticfield. But I have
problem
by creating a "variableelectrostaticfield". Can you give me a guide?

Thanks in AdvanceA "variableelectrostaticfield" is an oxymoron since an "electrostaticfield" has no tlime dependence, while "variable" means a time
dependence. You can get an approximation to anelectrostaticfieldif
the time variation of E is slow enough that the curlB=-dE/dt given by
Maxwell's equation is negligible.

--
Meir Achuz

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