| Author |
Message |
jason
Guest
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 Posted:
Fri Mar 04, 2005 6:10 am Post subject:
signal and capacitor |
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Hello All
I wish to know what will happen for the case of 1)DC and 2)AC input
power or signal to the capacitor in a circuit.
I heard that capcitor can act as a short or open circuit depending on
DC or AC(in high or low frequency input power signal or signal itself).
Can anyone help to explains this clearer in the point of view from
physics and electronics?
Kindly share
Thank you
rgds and thanks
Jason
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Guest
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| Posted:
Fri Mar 04, 2005 1:45 pm Post subject:
Re: signal and capacitor |
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DC - capacitor block current - infinite resistance
AC - passes thru cap... if w= 0 zero resistance
Regards
Vibhash Chandra Jha
jason wrote:
| Quote: | Hello All
I wish to know what will happen for the case of 1)DC and 2)AC input
power or signal to the capacitor in a circuit.
I heard that capcitor can act as a short or open circuit depending on
DC or AC(in high or low frequency input power signal or signal
itself).
Can anyone help to explains this clearer in the point of view from
physics and electronics?
Kindly share
Thank you
rgds and thanks
Jason |
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| Back to top |
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John Popelish
Guest
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| Posted:
Fri Mar 04, 2005 9:44 pm Post subject:
Re: signal and capacitor |
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jason wrote:
| Quote: |
Hello All
I wish to know what will happen for the case of 1)DC and 2)AC input
power or signal to the capacitor in a circuit.
I heard that capcitor can act as a short or open circuit depending on
DC or AC(in high or low frequency input power signal or signal itself).
Can anyone help to explains this clearer in the point of view from
physics and electronics?
|
The relationship between current through a capacitor and the voltage
across it is:
I=C*(dv/dt), where I is current in amperes, C is capacitance in
farads, and dv/dt is time rate of change of voltage in volts per
second.
Since pure DC has zero volts pure second rate of change, the current
is zero. For any other waveform from pulses to sinusoids, there are
various rates of voltage change at different times, so different
instantaneous currents at different times.
--
John Popelish
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jason
Guest
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| Posted:
Wed Mar 09, 2005 6:10 am Post subject:
Re: signal and capacitor |
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Thank you All
The explanations are great.
:)
I simply amazed with so much of great answer and help from many people
Thank you so much for who ever written up there to help me
thank you
Jason |
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