Questions tagged [capacitance]
The ability of an object to store electric charge.
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Why is the electric field strength ($V/d$) constant in a charging capacitor?
The electric field strength at a point in a charging capacitor $=V/d$, and is the force that a charge would experience at a point. This doesn't seem to make sense, as all the capacitor is is 2 plates,...
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Telegraphers' equations for lossy transmission line when $R$, $L$, $G$, and $C$ are frequency dependent
The telegraphers' equations are commonly written as
$$\frac{{\partial v(z,t)}}{{\partial z}} + R\space i(z,t) + L\frac{{\partial i(z,t)}}{{\partial t}} = 0$$
$$\frac{{\partial i(z,t)}}{{\partial z}} + ...
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How does this circuit behave?
A,B are connected to a battery with $V$ voltage. When $S$ is open we can just calcualte the total capacitance simply. What happens when it's close? I don't see which capacitors are connected series ...
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Why can a isolated spherical conductor act as a capacitor?
So, a while ago I learned that a spherical isolated conductor can act as a capacitor now my question is how? I mean, a capacitor usually requires two plates to hold charge but in this case there's ...
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Force on dielectric while entering a capacitor - Connected to battery
I had seen a similar question to this as below. However it considers a charged capacitor disconnected from a voltage source.
Force on dielectric slab
As per my understanding from the comments, the ...
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How does capacitance of a capacitor not depend on the distance of the capacitor to a battery?
When you consider the positive terminal of battery, wire and capacitor plate, they form a single conductor, which is polarised by the field of the other capacitor plate, but it is not polarised as ...
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What happens to Capacitors at extreme temperatures and pressures?
In my University physics class [first year engineering student] I learned that
"for a capacitor in a vacuum, capacitance $C$ depends only on the shapes, dimensions, and separations of the ...
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What will be the difference between dielectric inserted quickly and dielectric inserted slowly in an capacitor?
CASE 1:
If dielectric is inserted QUICKLY then what difference will we see in the charge , potential, capacitance?
CASE 2:
If dielectric is inserted SLOWLY then what difference will we see in the ...
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Charging Capacitor with grounded terminal [closed]
I had a question about the charging of a parallel plate capacitor. Let's assume the following situation: we connect the negative terminal of the battery and one of the capacitor plates to ground. The ...
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Charging Capacitor with one terminal grounded [closed]
I'm reading the capacity chapter of Serway's book, and I had a question about the charging of a parallel plate capacitor.
Let's assume the following situation with a modification of the circuit in the ...
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Applying Microscopic Form of Ohm's Law to Leaky Capacitor
When we write $j=\sigma E$ in a conductor, is $E$ here the net electric field produced by the electrons and the source that drives the current? For example, inside an electrolytic cell (let us assume ...
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Is a battery always electrically neutral in the circuit? If so, why?
In this circuit, the sum of the charges on both the plates is 0.The sum of the charges present on the negative terminal and positive terminal of the battery is also 0 (I think). Is it possible for the ...
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Distribution of charge in series capacitor arrangement
If I have 3 capacitors in series connected as shown- C1=C2=C3=C)
And let a charge 'Q' is on all 3 capacitors.
Then if a question is asked 'What is total charge in the circuit?'
Why '3Q' is the wrong ...
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Discharge of a capacitor with variable backvoltage?
I understand that the voltage of a capacitor as it discharges overtime is $$V(t)=V_0e^(-t/RC).$$
I've also heard people say things like "voltage is relative. The voltage to the ground or the ...
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Do conductor plates encloising charged particles exert a force on one another due to the charges induced on them? How to calculate in a 1D model
I would very much appreciate some guidance on the below.
Consider a one-dimensional world as depicted in the attached figure.
We have two (lets say positively charged) particles enclosed by two ...
