On Aug 13, 2007, at 7:44 AM, Michel Jullian wrote:
1. Is it possible to establish a condition where it is certain there
are more negative charges than positive at some point P on a given
plate surface?
2. Is it possible to establish a condition where it is certain there
are more positive charges than negative at some point P on a given
plate surface?
I think it is possible to do both.
Of course it is possible! For 1 connect the plate to the most
negative pole of a DC power supply, and connect a counterelectrode,
e.g. a ball held close to point P, to the most positive pole. For 2
reverse the polarities.
Suppose the DC power supply, a battery, carries a coulomb of excess
positive charge, or a coulomb of excess negative charge?
Horace Heffner
http://www.mtaonline.net/~hheffner/
