Linked Questions
14 questions linked to/from How does a capacitor block DC?
27
votes
8answers
39k views
Why does a capacitor block DC and not AC? [duplicate]
If someone can explain why a capacitor blocks DC, but not AC, with some math, I will understand all of that much better. I know that there are picture animations illustrating this, but I really want ...
9
votes
1answer
26k views
How Exactly Current Flow Through a Capacitor? [duplicate]
Capacitors behaving as an open circuits, How can we understand the concept of the Electrons flowing through a capacitors.
1
vote
1answer
24k views
conduction current vs displacement current across capacitor [duplicate]
Kindly help me understand the difference between conduction current and displacement current. Quick searches explain that displacement current is associated with changing electric field, frankly ...
2
votes
2answers
5k views
How does capacitor block DC when an AC signal is superimposed on top of it? [duplicate]
This question has been in my head for so many days. When I was studying BJT amplifiers, capacitors were used for blocking DC. It is called a coupling capacitor. When the AC signal is superimposed on ...
-2
votes
3answers
2k views
Is current able to flow through a Capacitor at DC? [duplicate]
Can someone clarify whether or not a capacitor blocks current at DC?
simulate this circuit – Schematic created using CircuitLab
1
vote
0answers
255 views
Current through Capacitor, how is it possible? How does it relate to displacement current? [duplicate]
What my professor is telling us that there is no conduction current through a parallel plate capacitor but the current that is passing through capacitor is the displacement current and this phenomena ...
16
votes
4answers
48k views
What is the purpose of a capacitor to ground?
I have here a filtering circuit from a microwave. What is the point of the capacitors to ground. Another answer in a previous question of mine said they were used for filtering however I don't ...
5
votes
1answer
6k views
Why place inline capacitors on PCIe traces?
What does a series capacitor on a PCIe signal trace do, and how does it work? I've read that a series capacitor smooths out ripple in a power line, but this is a signal trace, and I'd like to know ...
0
votes
2answers
7k views
High pass filter (HPF) removing the DC component of the voltage
The HPF attenuates frequencies which are below the cutoff frequency. But, in many cases a HPF is used to remove the DC level from any voltage.
For example, in this case, the IC AD5933 supplies an ...
0
votes
2answers
5k views
Capacitance and Voltage of Capacitors
I have looked all over the interwebs for a few good hours now, and I cannot find anything that simply explains a capacitor! I know that the capacitance of a capacitor is measured in uF, but what is ...
2
votes
2answers
1k views
Why can't a feedback network use a capacitor? [duplicate]
Possible Duplicate:
Basic Frequency Control Circuit
In the following schematic, why can't R4 be taken away and the feedback network pass output feedback through C2 and R2?
2
votes
4answers
157 views
How do capacitors in series work?
If capacitors are connected in series with a vltg source, then how would each plates get the polarity? For a single capacitor, the electrons from one plate are pumped by the source towards the other ...
1
vote
2answers
211 views
Will electrons be taken from a metal plate if a positive charge is applied to it?
If I have a single metal plate, a battery, and one wire. If I connect the wire to the positive on the battery to the metal plate, does that remove electrons from the metal plate?
I am attempting to ...
0
votes
2answers
92 views
Current flow from a charged capacitor [closed]
How does the electric field inside a charged capacitor force the electrons in a conductor to flow and establish electricity?