http://en.wikipedia.org/wiki/Static_electricityVery kind adam555
So how can we generate thousands of volts by rubbing ours feet in the carpet (i read this somewhere), and only liberate a few mA when we make contact with a conductor?
I have read that too but i don't understand how that is possible. Since voltage is the driving force that impels electric current, when you get more voltage you get more current? Right? Am i missing something....Rubbing your shoes on a carpet scrapes electrons off either you or the carpet. It depends on what materials are in action. The electrons create a high voltage but not much current.
How is it possible to scrape electrons off a surface? Because electrons are real physical objects. How is it possible to scrape jelly off a piece of bread?I have read that too but i don't understand how that is possible. Since voltage is the driving force that impels electric current, when you get more voltage you get more current? Right? Am i missing something....
Thank you for your reply it seems very pro but i need to look very well at it and reach some conclusion.Your body acts as one plate of a capacitor. By rubbing your feet, you are separating charge (moving electrons); missing electrons in the carpet, extra electrons on your body.
Each electron carries charge. Stored charge is measured in Coulombs. One electron carries −1.602176565(35)×10−19 Coulomb of charge.
The voltage that appears across a charged capacitor can be found by transposing this equation: Q=CV, or V=Q/C. If C is small, the Voltage can be very large.
As your body discharges via a small arc, the current is carried by the ionized air in the arc, the effective resistance of which can be quite high. The Peak current is limited due to Ohms law. The duration of how long the current flows can be determined by Q=It, where I is in Amps, and t is in sec.
I have read that too but i don't understand how that is possible (The electrons create a high voltage but not much current - Was this fact that i don't understand). Since voltage is the driving force that impels electric current, when you get more voltage you get more current? Right? Am i missing something....How is it possible to scrape electrons off a surface? Because electrons are real physical objects. How is it possible to scrape jelly off a piece of bread?
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Yes, but remember that you also have resistance in that formula; so, if you increase the voltage, but at the same time increase the resistance proportionally, you will end up with the same current -the same amps-.I have read that too but i don't understand how that is possible (The electrons create a high voltage but not much current - Was this fact that i don't understand). Since voltage is the driving force that impels electric current, when you get more voltage you get more current? Right? Am i missing something....
Now every thing starts to mais sense finally i should say. Very appreciate to ali of you that reply to this post.Yes, but remember that you also have resistance in that formula; so, if you increase the voltage, but at the same time increase the resistance proportionally, you will end up with the same current -the same amps-.
For example:
1 Volt / 1 Ohm = 1 Amp
and
1000 Volts / 1000 Ohms also = 1 Amp
You see now how you get the same amperage with 1000 volts difference? In the same way you can have a high voltage and a low amperage.