Yes, this is in line with my thoughts. RP On 14 December 2014 at 21:40, Sean Breheny wrote: > I didn't read the entire stackexchange posting but I suspect that the > threshold and subsequent decreasing voltage has something to do with stra= y > capacitance in the measuring set-up and also possibly capacitance betwee= n > the setup and earth. Your voltmeter/electrometer has some tiny internal > capacitance plus capacitance between its leads. This is in parallel with > the test capacitor. As the voltage increases, some of the charge in the > test capacitor is transferred to the parasitic capacitance. When the test > capacitance begins to approach the value of the parasitic capacitance, th= en > the voltage will no longer be able to increase much because increasing > voltage would require more charge to be transferred to the parasitic > capacitance. > > > On Sun, Dec 14, 2014 at 1:38 AM, Richard Prosser > wrote: > > > > Hi Mario, > > > > The link Rubin posted explains the situation quite well. I'm not sure > about > > why there's a threashold point where the voltage starts decreasing > though. > > > > It's not static electricity being generated - it's just a consequence o= f > > the conservation of charge. > > > > Richard > > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .