Electric fields
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 5th April 2012, 07:11 PM #1 akis   diyAudio Member   Join Date: Jul 2008 Electric fields Hello Did not know where else to post this question - how do I translate the strength of an electric field say across the plates of a capacitor from say 1V/cm to something more common, eg Volts? Thanks Akis
 5th April 2012, 07:21 PM #2 Lukas87   diyAudio Member   Join Date: Jun 2010 Location: Prague Just multiply the E (in V/m) by the distance (in m, of course) between the plates.
 5th April 2012, 07:28 PM #3 DF96   diyAudio Member   Join Date: May 2007 The strength of an electric field is V/m (volts per metre). If you want something more common that that I suppose you could convert it to volts per foot or volts per inch.
akis
diyAudio Member

Join Date: Jul 2008
Quote:
 Originally Posted by Lukas87 Just multiply the E (in V/m) by the distance (in m, of course) between the plates.
I figured as much. So 1V/cm across say 15cm is really 15 Volts.

 5th April 2012, 08:36 PM #5 DF96   diyAudio Member   Join Date: May 2007 No. 1V/cm is the strength of the electric field. If this field strength is maintained over a distance of 15cm then you will get a potential difference of 15V. Two different measurements of two different things: electric field and potential. Its like the difference between the height of a hill and the slope. Both tell you something about the hill, but they tell you different things so are measured in different units.
Cogwulf
diyAudio Member

Join Date: Mar 2012
Quote:
 Originally Posted by akis Hello Did not know where else to post this question - how do I translate the strength of an electric field say across the plates of a capacitor from say 1V/cm to something more common, eg Volts? Thanks Akis
You don't, an electric field is an electric field, if you want to know volts you need to measure volts.
Quote:
 I figured as much. So 1V/cm across say 15cm is really 15 Volts.
Yes, though most practical applications are more likely to be measured in v/um

Lukas87
diyAudio Member

Join Date: Jun 2010
Location: Prague
Dear Akis - look on the problem in a way that the E is like the slope of the hill and the V is like the height. It will be all much easier to understand.

Quote:
 Originally Posted by DF96 Its like the difference between the height of a hill and the slope.

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