Szczepan Bialek wrote:

"Ian" napisa? w wiadomo?ci
...
"Szczepan Bialek" wrote in message
.. .
A box is not the best condenser.
You should use the Leyden jar.
S*

How about a nice modern compact capacitor?

It should be with the low leakage. The Leyden jar has a thick insulation.
And,

"Any type of capacitor may develop excessive leakage if the capacitor is
subjected to excessive applied voltage or high-voltage spikes."

.It was known in Marconi time:
"It is now perfectly well known that a condenser, if large enough, does not
prevent the passage of high frequency oscillations, and therefore in these
cases
the earth is for all practical purposes connected to the antennae." (Marconi
1909).

In reality the real condenser conducts (electrons are flowing) the DC but do
not AC.
In the teaching program is opposite.
S*

What an utter idiot.

Who wants to try to explain to this babbling idiot that the impedance of
a capacitor is 1 / ( 2 X pi X f X C) which means if f is zero (DC) the
impedance is infinite and there is no conduction (in an ideal capacitor).