A very strange description, especially on why one would use an oscilloscope.If we have a point charge of significant value, would osciloscope measure voltage if we just point the electrodes in two diffrent point in space?
A particular form of voltmeter with an extremely high input resistance would show movements of the needle. They are available with Hundreds of MΩ input impedances and tend to cost a bit. I approve of the idea of using a scope because you can see the history of your movements on the trace - but not with the sensitivity that you would need for 'everyday' electrostatic situations.If you use a voltmeter,
How about this: any measurement requires some transfer of energy. Therefore any electrical measurement requires movement of charge (current) through a potential (voltage). A gold leaf electrometer will measure very high potentials using a tiny amount of charge. A galvanometer will see tiny voltages but requires some current. This could be a very long list but the fundamental premise is, I believe, correct. So you choose what you wish to measure.So technicaly osciloscope or voltmeter measure only voltage where current is possible?
No?I am asking this from theoretical point of view. And the quetion I had was basicaly does oscciloscope or volmeter meassure voltage created from static charge at two diffrend distances of this card ,(Calculated V=Q/4*pi*e0*r) and the answer in as I understand pretty much no.
So will they? Do you have voltmer and can test that?No?
Then how do you explain how this type of experiment that is common in general physics labs works?
I do know the exact procedure that you do, but if I undestand correctly you say that if we have a charge on Van de Graffs generator of let say 1nC and we measure the potential using votlmeter at 1 and 5 m voltmeter would show 7V?I have my students do that in their labs!
Did you miss the fact that this is a rather COMMON experiment in schools?
I would use a Electrostatic voltmeter to measure the VDG, though I haven't tried it myself yet.I do know the exact procedure that you do, but if I undestand correctly you say that if we have a charge on Van de Graffs generator of let say 1nC and we measure the potential using votlmeter at 1 and 5 m voltmeter would show 7V?
I see so if you have a sufficient current constant voltage source and a 2D problem you can use carbon paper and a DVM. That's a fine lab demo....What don't you get? The link that I gave is a lab instruction. The procedure is all there.