Discussion in 'Electronic Basics' started by jason, Mar 3, 2005.

1. ### jasonGuest

Hello All

Can anyone enligthen me about how a the capcitor charging and
discharging in a configuration of a battery(and ac power supply) and
capacitor in series?
I am wondering if the the charge flow can goes through the capacitor
plates? How actually the flow of electron and current to the capacitor
at two side of the battery terminal(ac signal)?
Kindly help me to understand this.
If there is any online document that explains this well, kindly show me

Thank you

rgds and thanks
Jason

2. ### Robert MonsenGuest

The idea behind capacitors is really simple. At their simplest, they are
just two electrically conductive plates separated by a thin insulating
barrier. Electrons repel each other, and so if you force electrons onto
one of the plates, it'll repel the electrons on the other plate, making
them move away and out the other terminal. The way you change the number
of electrons on the plate is to change the voltage between the plates.

This makes it seem like the electrons are moving through the plate, but
they really aren't, they are just acting like they are, when the voltage
changes. Once the voltage stops changing, an arbitrary DC voltage can be
across the plates, and no current will flow.

The equation that describes this is

current = capacitance * rate of change of voltage over time.

--
Regards,
Robert Monsen

"Your Highness, I have no need of this hypothesis."
- Pierre Laplace (1749-1827), to Napoleon,
on why his works on celestial mechanics make no mention of God.

3. ### jasonGuest

Thanks a lot Robert