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Photo1234
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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?
Photo1234 said: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.ZapperZ said:If you use a voltmeter,
Photo1234 said:So technicaly osciloscope or voltmeter measure only voltage where current is possible?
Photo1234 said: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.
ZapperZ said:No?
Then how do you explain how this type of experiment that is common in general physics labs works?
http://ipl.physics.harvard.edu/wp-uploads/2013/03/ps3_s08_1.pdf
Zz.
Photo1234 said:So will they? Do you have voltmer and can test that?
ZapperZ said:I have my students do that in their labs!
Did you miss the fact that this is a rather COMMON experiment in schools?
Zz.
Photo1234 said: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?
ZapperZ said:I have my students do that in their labs!
Photo1234 said: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?
hutchphd said:Please indicate the procedure. I don't get it.
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...ZapperZ said:What don't you get? The link that I gave is a lab instruction. The procedure is all there.
Zz.
Voltage measurement is the process of determining the electrical potential difference between two points, which is also known as voltage. It is typically measured in units of volts (V) and is a fundamental concept in electricity and electronics.
Voltage can be measured using a voltmeter, which is a type of electrical measuring instrument. The voltmeter is connected in parallel with the component or circuit being measured, and it displays the voltage reading on a scale.
Point charges are particles with a specific amount of electric charge concentrated at a single point. The voltage at a point charge is directly proportional to the amount of charge and inversely proportional to the distance from the charge. In other words, the closer the point charge, the higher the voltage.
Measuring the voltage of a point charge can provide important information about the electric field and potential energy at that point. This can be useful in understanding the behavior of electric charges and designing electrical systems.
Yes, voltage measurements can be negative. This indicates that the direction of the electric field is opposite to the direction of the conventional current flow. Negative voltage values can also indicate a decrease in potential energy from one point to another.