All Questions
Tagged with homework-and-exercisescapacitance
401 questions
-1votes
0answers
25views
Deriving rate of voltage change of capacitor in parallel with resistor only knowing resistance and capacitance [closed]
This is an AP Physics question that I have been struggling to solve without including I_const in my equation. I am pretty sure its not allowed as a physical constant, is there any way to derive dv/dt ...
0votes
0answers
40views
Instantaneous current across a resistor in a comples $RC$ circuit [closed]
So This was a question asked in an exam This is multi correct question so more than one options may be correct. I have a confusion in option C If S1 is kept close for a long time then potential ...
1vote
2answers
63views
I want to find the capacitance of the following circuit by electron flow approach [closed]
I am trying to find the total capacitance of the circuit by making the electrons flow instead of finding the potential but this specific problem I couldn't solve. Even though I know the solution by ...
- 45
0votes
1answer
75views
Why capacitor potential difference isn't zero when its connected to ground in DC circuits? [closed]
Why Capacitor potential difference isn`t zero when its connected to ground in DC circuits
2votes
0answers
48views
If the number of electrons on an item gets doubled, does the electric charge of the item gets doubled as well?
If the number of electrons on an item gets doubled, does the electric charge of the item gets doubled as well? I know this looks like a very elementary question, but it caused me a huge confusion. I ...
- 129
1vote
0answers
90views
Multi-plate capacitor US physics olympiad 2008 problem A1 [closed]
In the solutions I used a different approach by assuming $\sigma_1, -\sigma_2, \sigma_2, -\sigma_1$(because of symmetry and field outside has to be zero) as in problem 3.21 from E and M Purcell. I ...
- 47
0votes
0answers
44views
Voltage across Capacitor in Series after shorting internal capacitor
I have what appears to be a very simple question, but I have not seen it asked anywhere and would like to verify my solution is correct. Imagine that you have 3 capacitors in series, each with an ...
- 133
-1votes
1answer
49views
What will Electric field be when the charge on negative side of Capacitor is changed? [closed]
One of the two parallel metallic plates is uniformly charged with charge $+q$, and the other one is charged with charge $-q$, the electric field between them is $E$. When the negatively charged plate ...
1vote
0answers
34views
Exercise (electric field in a dielectric) [closed]
I am trying to solve the following exercise about the electric field generated by a spherical conductor: "A spherical conductor of ray $R=8cm$ and charged with $Q=8\mu C$ is half contained in a ...
- 187
1vote
1answer
142views
A capacitor partially filled with dielectric [closed]
Assume a parallel plate capacitor that was charged up to $Q_0$ from a source $U_0$ and then disconnected from the voltage source. The plates have an area $A$ and the distance between the plates is $d$....
- 33
0votes
1answer
49views
Capacitance, Rate of charge flow
In the given circuit how would the charge on capacitor vary with time if switch is closed at $t=0$. I know it will increase with time but what will be the exact function. My book says it will be $CE(1-...
0votes
2answers
55views
What is the voltage across the capacitor and the charge it stores
Assume the switch has been on for a long time. Is it always the case that the voltage across the capacitor = the voltage of the battery? Even though they're in parallel.
- 21
0votes
2answers
100views
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 ...
- 15
3votes
1answer
138views
Dielectric between capacitor
I encountered the following problem: A parallel plate capacitor has plate area $A$ and plate separation $d$.The space between the plates is filled up to a thickness $x<d$ with a dielectric of ...
- 327
0votes
1answer
51views
How to find the capacitance between two metal sheets [closed]
Let’s say I have two metal sheets in a 2D plane. The first one has area A, the second one is infinitely long, and they are separated from each other by a distance d. How can I find the capacitance ...
