# Questions tagged [capacitance]

The ability of an object to store electric charge.

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### Current in RC circuit using Thevenin's equivalents or Kirchoff's laws

Say we have a DC circuit with multiple capacitors and resistors (and batteries) in it. All capacitors are assumed to be initially uncharged. Suppose we're interested in finding the current through ...
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### Adjustment Required for Force between Plates of a Parallel Plate Capacitor

The parallel plate Capacitor is not an Infinite sized charged sheet system. But in Most derivations of Force between the Charged plates due to the electric field and charges between/on the plates is ...
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### Self-capacitance of electrodes in capacitors

I thought about a way in which we could increase self-capacitance of electrodes in a dielectric capacitors. Is it possible to create an internal electric field in each electrode which would have an ...
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### Question about capacitance on a double cylinder [closed]

I had an exercise that I am struggling to solve, I have 2 concentric metal surfaces with $R_1= 1 \,\text{cm}$ and $R_2 = 2 \,\text{cm}$. The cylinders have infinite extension along the direction ...
49k views

### Force between the plates of a capacitor

As we know that the electric field between two parallel plates of a capacitor is $$E=\frac{\sigma}{\epsilon_0}$$, so the magnitude of force exerted by one plate on the other should have been $$F=QE$$. ...
325 views

### Why can we consider two conducting spheres very far apart from each other as a capacitor?

If we have two conducting spheres of equal but opposite charge and they are at a large distance from each other, why can we consider this system as a capacitor? According to my textbook, this is valid....
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### Discharge only one plate of capacitor?

what would happen if : Charge a parallel plate capacitor with battery Then disconnect the battery And finally, connect the positively charged plate to battery ground (similar to the induction-charged ...
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### Failing to understand use of one-dimensional upper limit in area variable

I am trying to learn capacitance of a parallel plate capacitor, while learning i noticed the portion where they are calculating potential using line integral. Now, there is a term "ds" which is the ...
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### Law of conservation of energy and circuits

How does the law of conservation of energy work in circuits? If we have a voltage source to which a resistor, capacitor and and an inductor are connected, then will the kinetic energy of the ...
24k views

### Conducting and non-conducting infinite sheets of charge have same $E$? ($E$= electric field intensity)? [closed]

From my textbook the description is given below to the image.
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### Time constant relevance and definition for an RC or any 1st order RC/RL or a 2nd order RLC circuit

Can someone clearly explain what it is meant by the time constant of an RC circuit. Because from what I have been told it is the time taken to charge the capacitor. However, when I search on google it ...
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### How do I find the charge on this capacitor in a complex circuit with multiple batteries? [closed]

! I have the answer to this question, it's 8*10^-6 C. But I have no idea how to get this answer.
4k views

### Inductor and Capacitor in Parallel

I've been staring at this for 10 minutes and I'm soooo confused. Hopefully, you guys can help! So, let's say we close the switch. From what I understand, the capacitor will charge up to $10V$ almost ...
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### How do I derive the frequency of oscillation of the capacitor voltage? [closed]

The formula is $$\omega= \frac{1}{\sqrt{L \times C}}.$$ How do I derive this?
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### Attenuation of a signal

Suppose that I have a wire between two terminals and I want to send a high frequency ($f$) signal from one to another. Is the inductance and capacitance per unit of distance enough to calculate the ...